====== Memcached (ElastiCache) ======

**What it is:** A simple in-memory caching system.

**What it’s for:**
  * Simple cache use cases with very fast access.
  * Good when you don’t need Redis features.

**Key ideas:**
  * Simpler feature set than Redis.
  * Often used for straightforward caching.

**Hard words:**
  * *straightforward* /ˌstreɪtˈfɔːrwərd/: đơn giản, trực tiếp