| Latency | Availability | Throughput |
|---|---|---|
 |
 |
 |
| Caching | Load Balancers | Proxies |
 |
 |
 |
| CAP Theorem | Database | Distributed System |
 |
 |
 |
| Network Protocols | Consistent Hashing | Process in OS |
 |
 |
 |
| Long Polling | WebSockets | Server-Sent Events |
 |
 |
 |
| Map Reduce | Storage and Redundancy | PubSub Pattern |
 |
 |
 |
| Dropbox | Uber | ||
|---|---|---|---|
 |
 |
 |
 |
| Youtube | Messenger | Yelp | |
 |
 |
 |
 |
| TinyURL | Rate Limiter | Web Crawler | Typeadead Suggestion |
 |
 |
 |
 |