Clearing up a few strange terms related to accessibility.
- A user agent is the client application used with a particular network protocol.
- Device independent means a user can perceive and interact with the Web through any type of apparatus (mobile phones, PDAs, interactive television systems, etc.). Device independent on Wikipedia
- Assistive Technology (AT) is a generic term that includes assistive, adaptive, and rehabilitative devices and the process used in selecting, locating, and using them.
- A deprecated element or attribute is one that has been outdated by newer constructs.