CDs are circular discs that are 4.75 in (12 cm) in diameter.
The CD standard was proposed by Sony and Philips in 1980 and the technology was introduced to the U.S. market in 1983.
*******
VU FIA PAPER 18-12-2021
CD stand for Compact Disk.
Laser technology is used in CD.
Get instant updates and alerts directly from our site.
Install this app on your device for quick access right from your home screen.
