While the registry is composed of an organizd set of keys, values, and data, there is very little formal documentation of the setttings it contains. We cannot guarantee that the settings are 100% accurate due to this limitation.

The following registry settings are described here:

Registry Calendar
Registry Communicator Mobile
Registry Input
Registry Messaging - Inbox
Registry Network
Registry Pocket Internet Explorer
Registry Storage
Registry System
Registry User Interface

Note: Many of the settings for Windows CE are applicable to Windows Mobile because Windows CE is the core operating system of Windows Mobile. However there is no guarantee that a Windows CE setting will work on Windows Mobile.

Note: Microsoft, OEMs and carriers do not support end users editing the registry. If you edit the regisry you do so at your own risk!

Also see the following Wiki pages:
Registry
Registry Editors