What is cd meaning?

A CD, short for Compact Disc, is a digital optical disc used to store and distribute music and other audio recordings, as well as computer software, video games, and other types of data. The CD was first introduced in the early 1980s and quickly became the standard medium for music distribution, replacing vinyl records and cassette tapes. CDs can hold up to 700 megabytes of data, which equates to approximately 80 minutes of uncompressed audio. They can be played on standalone CD players, car stereos, personal computers, and other devices with CD drives. CDs have largely been supplanted by digital music downloads and streaming services, but they remain common for certain applications, such as physical audio collections and archival data storage.