Unlike a cassette tape that stores its audio and visual information in analog format CD and DVD stores information in digital format and will not degrade in quality as copies are made. In other words, you could make hundreds of copies of an audio CD or movie and each of those copies would be 100% identical to the original.

  • How to burn or create a CD or DVD on a computer.
  • See our CD and copy definitions for further information and related links.
  • CD-ROM help and support.