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C

CD-Audio

CD-Audio is a device for playing back digital audio tracks. A CD-Audio disc can contain up to 99 tracks with a maximum total duration of about 72 minutes. Can be played back from a hi-fi, a car stereo or a computer's CD-ROM drive. In a learning context, CD-Audio has one simple purpose - to play back audio, in particular speech or music.

CD-I

A specialised form of CD-ROM developed by Philips as a means for delivery of interactive multimedia material, including games and educational programmes. Launched in the early 90s, CD-I never took off on a widescale basis and has been discontinued.

CD-ROM

CD-ROM is a read-only digital data storage medium that can contain any types of computer file, just like a standard computer hard disk. In a learning context, CD-ROMs are typically used to store interactive self-study materials and multimedia files. Maximum capacity is about 720K.

Chat room

Chat rooms provide synchronous communication capabilities for large numbers of users within the context of a web site. Most Internet chat rooms are open to all comers, but in the context of a virtual learning environment (VLE) or learning management system (LMS), access is usually restricted.

Dialogue in chat rooms is usually restricted to text and sometimes emoticons (little pictures representing different emotions).

Chat sessions can be usefully employed in online, distance learning courses to allow for real-time group collaboration.