What Is Cd Mean

What is CD mean?

CD stands for compact disc. Compact discs were first introduced in 1982 and quickly became the dominant form of music distribution. Compact discs are a type of optical disc that use laser light to read and write data.

Compact discs are made of polycarbonate plastic and usually measure 12 cm in diameter. They have a diameter of about 8 cm and a thickness of 1.2 mm when empty. The disc is coated with a thin layer of aluminum and then covered with a protective layer of lacquer.

Compact discs are read by a laser beam that …