Topic: Caching

O'Reilly Network articles about this topic:

Cache-Friendly Web Pages (Linux DevCenter)
Caching saves time and bandwidth. Here are some of the advantages of caching, as well as an example of how to set up cache headers in Apache, focusing on the Expires and Cache-Control headers.

Other documents about this topic:

Below are other references available on the web for this topic. Since other sites may change their links, please if you find any that may need to be updated.

Caching Tutorial
Caching Tutorial for Web Authors and Webmasters