+---------------+      +---------------+       +---------------+                                                                                                
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                                                                                                                                                                          |    Android    |      |    Iphone     |       |      Web      |                                                                                                
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                                                                                                                                                                          +---------------+      +---------------+       +---------------+                                                                                                
                                                                                                                                                                                                                                                                                                                                          
                                                                                                                                                                                                                                                                                                                                          
                                                                                                                                                                                                                                                                                                                                          
                                                                                                                                                                                                                                                                                                                                          
                                                                                                                                                                                                                                                                                                                                          
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                                                                                                                                                                                            /    +-------|-------+    /                                                                                                                   
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                                                                                                                                                                                                 Twitter Frontend                                                                                                                         
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                                                                                                                                                                                                //               |                                                                                                                        
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                                                                                                                                                                                        ///      |               |//                                                                                                                      
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                                                                                                                                                                         //                      |               |        //                                                                                                              
                                                                                                                                                                      ///                        |               |          /                                                                                                             
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                                                                                                                                                                 ///                             |               |            //                                                                                                          
                                                                                                                                                               //                                +---------------+              /                                                                                                         
                                                                                                                                                            ///                                                                  /                                                                                                        
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                                                                                                       +-----------------|---------------------------------------------------------------------------------------------------------------------------|----------+                                                                         
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                                                                                                       |                 |                                                                                                                   +-------|-------+  |                                                                         
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                                                                                                       |   +-------------|--------------+                                                                                                    |               |  |                                                                         
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                                                                                                       |   |                            |       +-------------------------------------------------------------+                              |               |  |                                                                         
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                                                                                                       |   |                            |       |                                                             |                              |               |  |                                                                         
                                                                                                       |   | TLS-API (being deprecated) |       |    ## Tweet/user content hydration, visibility filtering    |                              |    GraphQL    |  |                                                                         
                                                                                                       |   |                            |       |                                                             |                           Federated Strato Column                                                                         
                                                                                                       |   |                            |       |                                                             |                              |               |  |                                                                         
                                                                                                       |   |                            |       |                                                             |                             //               |  |                                                                         
                                                                                                       |   |                            |       |                                                             |                          /// |               |  |                                                                         
                                                                                                       |   |                            |       +-------------------------------------------------------------+                        //    |               |  |                                                                         
                                                                                                       |   |                            |                                                                                           ///      |               /  |                                                                         
                                                                                                       |   |                            |                                                                                        ///         |               |//|                                                                         
                                                                                                       |   +----------------------------+                                                                                     ///            |               |  /                                                                         
                                                                                                       |                 |                                                                                                  //               |               |  |//                                                                       
                                                                                                       |                 |                                                                                               ///                 |               |  |  //                                                                     
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                                                                                                       |                 |                                                                           ///                                     +---------------+  |             /                                                           
                                                                                                       |                 |                                                                         //                                                           |              //                                                         
                                                                                                       |                 |                                                                      ///                                                             |                //                                                       
                                                                                                       |                 |                                                                   ///                                                                |                  /                                                      
                                                                                                       |                 |                                                                ///                                                                   |                   //                                                    
                                                                                                       |                 |                                                              //                                                                      |                     /                                                   
                                                                                                       |                 |                                                           ///                                                                        |                      //                                                 
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                                                                                                       +-------------------/------------------------------------------------/-----------------------------------------------------------------------------------+                         /                                               
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                                                                                                                                    /                        ///                                                                                                                               /                                          
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                                                                                                                                      /            ///                                                                                                                                          /                                         
                                                                                                                                       //       ///                                                                                                                                             |                                         
                                                                                                                                         ///////                                                                                                                                                |                                         
                                                                                                                                         /// ////                                                                                                                                               |                                         
                                                                                                                                     ////        ////                                                                                                                                           |                                         
                                                                                                                                  ///                ///                                                                                                                                        |                                         
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                                                                                                    ///                                                                               ////                                                                                                      |                                         
                                                                                                ////                                            +-----------------------------------------//----------------------------------------------------------------------------------------------------|--+                                      
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                                                                                              |                                                 |                                                                                  +----------------------------------+                            |                                      
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                                                                                      +-------|-------+                                         |                                                                                  |                                  |                            |                                      
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                                                                                      |               |                                         |                                                                                  |                                  |                            |                                      
                                                                                      |               |                                         |                                                                                  |      ## **Timeline mixer**       |                            |                                      
                                                                                      |               |                                         |                                                                                 - Inject ads, who-to-follow, onboarding                          |                                      
                                                                                      |  Home mixer   |                                         |                                                                                  |      - Conversation module       |                            |                                      
                                                                                      |               |                                         |                                                                                  |      - Cursoring,pagination      |                            |                                      
                                                                                      |               |                                         |                                                                                  |      - Tweat deduplication       |                            |                                      
                                                                                      |               |                                         |                                                                                  |      - Served data logging       |                            |                                      
                                                                                     /|               |                                         |                                                                                  |                                  |                            |                                      
                                                                                   // |               |                                         |                                                                                  |                                  |                            |                                      
                                                                                 //  /|               |                                         |                                                                                  |                                  |                            |                                      
                                                                               //   / |               |                                         |                                                                                  |                                  |                            |                                      
                                                                             //   //  +---------------/                                         |                                                                                  |                                  |                            |                                      
                                                                           //    /     /     /  /  /   /                                        |                                                                                  |                                  |                            |                                      
                                                                         //     /     /      /  /   /   /                                       |                                                                                  |                                  |                            |                                      
                                                                       //     //      /      /   /  /    /                                      |                                                                                  |                                  |                            |                                      
                                                                     //      /       /       /   /   /    /                                     |                                                                                  |                                  |                            |                                      
                                                                   //       /       /       /    /    /    /                                    |                                                                                  |                                  |                            |                                      
                                                                 //       //       /        /    /    /     /                                   |                                                                                  |                                  |                            |                                      
                                                               //        /         /        /     /    /     /                                  |                                                                                  |                                  |                            |                                      
                                                             //         /         /         /     /     /     /                                 |                                                                                  |                                  |                            |                                      
                                                           //         //         /          /     /     /      /                                |                                                                                  |                                  |                            |                                      
                                                         //          /          /           /     /      /      /                               |                                                                                  |                                  |                            |                                      
                                                       //           /           /           /      /      /      /                              |                                                                                  |                                  |                            |                                      
                                                     //           //           /            /      /      /       /                             |                                                                                  |                                  |                            |                                      
                                                   //            /            /            /       /       /       /                            |                                                                                  |                                  |                            |                                      
                                                 //             /             /            /        /       /       /                           |                                                                                  |                                  |                            |                                      
                                               //             //             /             /        /        /       /                          |                                                                                  |                                  |                            |                                      
                                             //              /              /              /        /        /        /                         |                                                                                  +----------------------------------+                            |                                      
                                           //               /              /               /        /         /        /                        |                                                                                                                                                  |                                      
                                         //               //               /               /         /         /        /                       |                                                                                                                                                  |                                      
                                       //                /                /                /         /         /         /                      |                                                                                                                                                  |                                      
                                     //                 /                /                /          /          /         /                     |                                                                                                                                                  |                                      
                                   //                 //                /                 /          /           /         /                    |                                                                                                                                                  |                                      
                                 //                  /                  /                 /           /          /          /                   |                                                                                                                                                  |                                      
                                 /                  /                  /                  |           /           /          /                  +--------------------------------------------------------------------------------------------------------------------------------------------------+                                      
                                /                   /                  /                  |           /           /          /                      |              |             |                          |                      |                                         |                                                            
                                /                  /                   /                  |           /            /          /                     |              |             |                          |                      |                                         |                                                            
                               /                   /                   /                  |           /            /          /                     |              |             |                          |                      |                                         |                                                            
                               /                   /                  /                   |           /            /           /                    |              |             |                          |                      |                                         |                                                            
                              /                   /                   /                   |            /            /          /                    |              |             |                          |                      |                                         |                                                            
                              /                   /                   /                   |            /            /           /                   |              |             |                          |                      |                                         |                                                            
                             /                   /                    /                   |            /            /           /                   |              |             |                          |                      |                                         |                                                            
                             /                   /                    /                   |            /             /           /                  |              |             |                          |                      |                                         |                                                            
                            /                    /                    /                   |            /             /           /                  |              |             |                          |                      |                                         |                                                            
                            /                   /                    /                    |            /             /           /                  |              |             |                          |                      |                                         |                                                            
                           /                    /                    /                    |            /              /           /                 |              |             |                          |                      |                                         |                                                            
                           /                    /                    /                    |            /              /           /                 |              |             |                          |                      |                                         |                                                            
                          /                    /                     /                    |             /             /            /                |              |             |                          |                      |                                         |                                                            
                          /                    /                     /                    |             /             /            /                |              |             |                          |                      |                                         |                                                            
                         /                     /                     /                    |             /              /            /               |              |             |                          |                      |                                         |                                                            
                         /                    /                     /                     |             /              /            /               |              |             |                          |                      |                                         |                                                            
                        /                     /                     /                     |             /              /            /               /              /             /                          |                      |                                         |                                                            
                        /                     /                     /                     |             /               /            /              /              /             /                          |                      |                                         |                                                            
                       /                     /                      /                     |             /               /            /             /              /              /                          |                      |                                         |                                                            
                       /                     /                      /                     |             /               /             /            /              /              /                          |                      |                                         |                                                            
                      /                     /                       /                     |              /               /            /           /               /             /                           |                      |                                         |                                                            
                      /                     /                      /                      |              /               /             /          /              /              /                           |                      |                                         |                                                            
                     /                      /                      /                      |              /               /             /         /               /              /                           |                      |                                         |                                                            
                     /                     /                       /                      |              /                /             /        /              /               /                           |                      |                                         |                                                            
                    |                      |                       |                      |              /                /             /       /               /               /                           |                      |                                         |                                                            
                    |                      |                       |                      |              /                 /             /     /               /               /                            |                      |                                         |                                                            
                    |                      |                       |                      |               /                 /             // //               /                /                            |                      |                                         |                                                            
                    |                      |                       |                      |               /                  /              /                 /               /                             |                      |                                         |                                                            
                    |                      |                       |                      |                /                 /             / /               /                /                             |                      |                                         |                                                            
                    |                      |                       |                      |                /                  /           /   /             /                /                              |                      |                                         |                                                            
                    |                      |                       |                      |                 /                  /        //     /           /                 /                              |                      |                                         |                                                            
                    |                      |                       |                      |                 /                   /      /        //        /                 /                               |                      |                                         |                                                            
                    |                      |                       |                      |                  /                   /    /           /       /                 /                               |                      |                                         |                                                            
                    |                      |                       |                      |                  /                    / //             /     /                 /                                |                      |                                         |                                                            
                    |                      |                       |                      |                   /                    /                /   /                  /                                |                      |                                         |                                                            
                    |                      |                       |                      |                   /                   / /                ///                  /                                 |                      |                                         |                 +--------------+                           
                    |                      |                       |                      |                    /                 /  /                 //                  /                                 |                      |                                         |                 |              |                           
                    |                      |                       |                      |                    /               //    /                / /                /                                  |                      |                                         |                 |              |                           
                    |                      |                       |                      |                     /             /       /              /   /    +------------+                                |              +---------------+                       +-------------------+       |              |                           
                    |                      |                       |                      |                     /            /         /            /     /   |            |                                |              |               |                       |                   |       |              |                           
            +--------------+       +---------------+       +--------------+       +--------------+       +-------------------+       +----------------+    // |            |                         +------------+        |               |                       |                   |       |              |                           
            |              |       |               |       |              |       |              |       |                   |       |                |      /|            |                         |            |        |               |                       |                   |       |              |                           
            |              |       |               |       |              |       |              |       |                   |       |                |       /            |                         |            |        |               |                       |                   |       |              |                           
            |              |       |               |       |              |       |              |       |                   |       |                |       |            |                         |            |        |               |                       |                   |       |              |                           
            |              |       |               |       |              |       |              |       |                   |       |                |       |            |                         |            |        |               |                       |                   |       |              |                           
            |              |       |               |       |              |       |              |       |                   |       |                |       |            |                         |            |        |               |                       |                   |       |              |                           
            |              |       |               |       |              |       |              |       |                   |       |                |       |            |                         |            |        |               |                       |                   |       |              |                           
            |              |       |               |       |              |       |              |       |                   |       |                |       |  Timeline  |                         |            |        |  Onboarding   |                       | People discovery  |       |    Fetch     |                           
            |  Tweety Pie  |       | Social graph  |       |  Gizmoduck   |       |  Manhattan   |       | Timeline Service  |       |  Home Ranker   |       |   Scorer   |                         |  Ad mixer  |        |    service    |                       |      service      |       |              |                           
            |              |       |               |       |              |       |              |       |                   |       |                |       |            |                         |            |        |               |                       |                   |       |  //          |                           
            |              |       |               |       |              |       |              |       |                   |       |                |       |            |                         |            |        |               |                       |                   |       ///            |                           
            |              |       |               |       |              |       |              |       |                   |       |                |       |            |                         |            |        |               |                       |                   |    ///|              |                           
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            |              |       |               |       |              |       |              |       |                   |       |                |      //            |                         |            |        |               |                       |           ///     |       |              |                           
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                                                                                                                                            /                 +-----//-----+                                               +---------------+                       +-///---------------+       |              |                           
                                                                                                                                            /                         //                                                                                          ///                          |              |                           
                                                                                                                                            /                           ///                                                                                    ///                             +--------/-----+                           
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                                                                                                                 |                   |       /                                ///                                                                             |                                   +----------------+                      
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                                                                                                         +----------------+          |   +-----------+           ///            +------------+       +--------+        +---------+       +----------------+   |                                   |                |                      
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                                                                                                         |                |          |   |           | //                       |            |       |        |        |         |       |                |   |                                   |                |                      
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                                                                                                         |  Home Scorer   |          |   |  CrMixer  |                          | EarlyBird  |       |  Utag  |        |  Space  |       |  Communities   |   |                                   |                |                      
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                                                                                                         |                |          |   |           |                          |            |       |        |        |         |       |                |   |                                   |//              |                      
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                                                                                                         |                |          |   |           |                          |            |       |        |        |         |       |                |   |                               //  | /              |                      
                                                                                                         +---/--//---/----+          |   +-----------+                          +------------+       +--------+        +---------+       +----------------+   |                             //    |/               |                      
                                                                                                            /   //   /               |                                                                                                                        |                            /      /                |                      
                                                                                                            /   //    /              |                                                                                                                        |                          //      /|                |                      
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                                                                                                           /   / /     /             |                                                                                                                        |                       //       /  +--/--------/----+                      
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                                                                                                         /     //       /            +------------------------------------------------------------------------------------------------------------------------+                  //         /       /          /                          
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                                                                                                       /      / /         /                                                                                                                                                 //           /         /            /                         
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                                                                                                              |                      /////          ////           //////                                                                                    /                /               /                   |                       
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                                                                                                              |                                                 ////            /////              /////                                                 /                 /                 /                    |                       
                                                                                                      +-------|-------+                                             ////             /////              /////                                           /                  /                 /                    |                       
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                                                                                                      |               |                                                      ////             /////               //////                               /                  /                  /                                            
                                                                                                      |               |                                                          /////             /////                /////                         /                  /                   /                                            
                                                                                                      |               |                                                               ////              ////                 /////                   /                   /                   /            +----------------+              
                                                                                                      |               |                                                                   /////             /////                 /////              /   +--------------/--+                /             |                |              
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                                                                                                      |               |                                                                            ////               /////                 ////// /     |                 |                /             |                |              
                                                                                                      |               |                                                                                /////               ////         +---------/////  |                 |       +--------/-----+       |                |              
                                                                                                      |               |                                                                                     ////               /////    |         /    /////               |       |              |       |                |              
                                                                                                      |               |                                                                                         /////               /////         |      |  /////          |       |              |       |                |              
                                                                                                      |               |                                                                                              ////               |/////    |      |       /////     |       |              |       |                |              
                                                                                                      |               |                                                                                                  ////           |     ////|      |            //////       |              |       |                |              
                                                                                                      |               |                                                                                                      /////      |         /////  |                 |/////  |              |       |                |              
                                                                                                      |               |                                                                                                           ////  |         |    ///                 |     ///              |       |                |              
                                                                                                      |               |                                                                                                               ///         |      |                 |       |              |       |                |              
                                                                                                      Prediction Service                                                                                                                | ...etc  |      |    Memcache     |       |  Manhattan   |       |    Scoring     |              
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                                                                                                      |               |                                                                                                                 |         |      |                 |       |              |       |                |              
                                                                                                      |               |                                                                                                                 +---------+      |                 |       +--------------+       |                |              
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                                                                                                      |               |                                                                                                                                  +-----------------+                              |                |              
                                                                                                      |               |                                                                                                                                                                                   +-------|--------+              
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                                                                                                                                                                                                                                                                                                          Prediction Service              
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                                                                                                                                                                                                                                                                                                          +---------------+