A Compact Disc (CD) capability in which data are recorded in more than one session. Each subsequent recording session can be linked to the previous so that they all appear as one. Each session adds overhead on the disc, because lead-in and lead-out sectors must be recorded each time, which take up from 13 to 15MB. See
multivolume,
multisession drive,
track-at-once,
disc-at-once and
CD Extra.