disc(A round, flat piece of nonmagnetic, shiny metal encased in a plastic coating, designed to be read from and written to by optical (laser) technology); disk(A device used to store information. There are two types of disks. Hard disks are permanent and installed into your computer. Floppy disks are portable and can be inserted into and removed from a floppy disk drive); drive(An area of storage that is formatted with a file system and has a drive letter. The storage can be a floppy disk, a CD or DVD, a hard disk, or another type of disk); blade; wheel
Blu-ray Disc(A high definition optical disc format which uses a smaller focus blue-violet 405 nm laser allowing higher precision and storage density. A competitor to HD DVD)
HD DVD(A high definition optical disc format which uses a smaller focus blue-violet 405 nm laser allowing higher precision and storage density. A competitor to Blu-ray Disc)
VCD(A recording format that can store about 70 minutes of video on a CD. Video CDs play on most Windows computers and DVD players. VCD image quality is about the same as that of a VHS cassette)
DVD(A form of storage characterized by high capacity (roughly 650 MB) and the use of laser optics rather than magnetic means for reading data. Optical disk storage commonly used for audio, video, and computer data. DVDs range in capacity from 4.7 GB to 17 GB, and can store significantly more than a CD-ROM)
SVCD(An optical disc format used to store video on standard compact discs developed by China Recording Standards Committee in competition to the DVD format)
