In a message dated 2/7/2005 9:16:58 P.M. Eastern Standard Time, Build_A_Computer@xxxxxxxxxxxxx writes: However, the technology didn't appear in the marketplace until Philips and Sony came out with the compact disc (CD) in 1982. What about those 12 inch video disc's? As far as I can remember, they were the first laser-read discs, a few years before cd's. Optical disc offers a number of advantages over magnetic storage media. An optical disc holds much more data. Then, why is it that a cd can only hold 79:57 of music and an open reel tape can hold up to 6.5 hours (or more) per-side. Dale For a web-based membership management utility and information on list policies, please see http://nibec.com/24hoursupport/ To unsubscribe, send a blank email to 24hoursupport-request@xxxxxxxxxxxxx with "unsubscribe" (without quotes) in the subject.