Macworld: Feature: Tiger Secrets: System settings, Page 1:

"Secret shortcuts. Hidden helpers. Mysterious menus. You could spend months tracking down all the undocumented features tucked away in Mac OS X 10.4, Apple's newest operating system. But chances are, you're too busy using Tiger for more-important tasks such as doing your job. So Macworld sent in a team of specially trained spies to uncover Tiger's deepest, darkest secrets."