# 5.5 Concurrency

- [5.5.1 Coroutines](/chapters/5.5-concurrency/7.2-coroutines.md): A coroutine is a concurrency design pattern that you can use on Android to simplify code that executes asynchronously.
- [5.5.2 Implementation of Coroutines](/chapters/5.5-concurrency/8.3-implementation-of-coroutines.md)
- [5.5.3 Coroutines with Networking Calls](/chapters/5.5-concurrency/8.4-coroutines-with-networking-calls.md)