Magnetic media function similarly to an audio cassette tape player: there is a device called a read/write head, which creates and reads magnetic impressions on the disk. Hard disks, floppy disks and DAT (digital audio tape) are types of magnetic storage media. OSTA members include Adaptec, Hewlett-Packard, Philips, and Sony. Incorporated in 1992, OSTA is made up of members and associates from the leading optical media manufacturers and resellers of North America, Europe, and Asia. The Optical Storage Technology Association (OSTA) is an international trade organization dedicated to the promotion of standardized writable optical technologies and related products. Durability is another feature of optical media they last up to seven times as long as traditional storage media. One optical disc holds about the equivalent of 500 floppies worth of data. Optical disc capacity ranges up to 6 gigabytes that's 6 billion bytes compared to the 1.44 megabytes (MgB) - 1,440,000 bytes - of the floppy. Optical media have a number of advantages over magnetic media such as the floppy disk. Optical media are storage media that hold information in digital form and that are written and read by a laser these media include all the various CD and DVD variations, as well as optical jukeboxes and autochangers. Standardization and compatibility issues aside, DVD is well-placed to supplant CD. DVD has, in the few years since, grown to include variations that do anything that CD does, and more efficiently. Promoters of the competing technologies failed to reach an agreement on a single standard until 1996, when DVD was selected as a convergence format. In the years since, format has followed format as the original companies and other industry members developed more adaptations of the original specifications.ĭigital Versatile disc (DVD) had its beginning in 1994, when two formats, Super disc (SD) and Multimedia CD (MMCD) were introduced. In late 1982, Philips and Sony released the first of the compact disc (CD) formats, which they then called CD-DA (digital audio). Russell's own company manufactured the first disc player in 1980, although the technology never reached the marketplace until Philips and Sony developed the technology. The dots were read by a laser, converted to an electrical signal, and then to audio or visual display for playback. Russell developed a photosensitive disc that stored data as 1 micron-wide dots of light and dark. In the late 1960s, Russell created a system that recorded, stored, and played audio/video data using light rather than the traditional contact methods, which could easily damage the disks during playback. The first disc that could be written and read by optical means (using light as a medium) was developed by James T.
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