1. A recording on a CD (CD-R or CD-RW) that is made at one particular time. Generally, multisession recording is possible; i.e. files can be copied in one session and then, more files copied in a later session, etc.

2. Information about connected parties in a networked transaction or information interchange, maintained for the duration of the communication activity. On the World Wide Web sessions play a key role in maintaining state, given the stateless nature of the HTTP protocol.