The simple answer is because that is what Sony originally called it. The CD is a spin-off of Sony's original Laserdisc invention launched in 1976.
Compact Disc
VCD stands for Video Compact Disk.
cd compact disc dvd Digital Video Disk
Compact disc - Read only memory
CD stands for a Compact Disc.CD can also mean Change Directory when used as a command.
Those would probably not be considered an "output" device. CD rom and compact disc are the same thing (CD stands for "Compact Disc").
Compact Disc-Read Only Memory
compact disc
It stands for Recordable Compact-Disk.
CD or compact disc DVD or digital versatile disc Mini SD
CD ROM stands for Compact Disc Read-Only Memory. A standard CD can be written to or read from, but a CD-ROM is loaded with pre-installed software for the user.
the person who invented the compact disk system was James russelJames Russell invented the compact disk in 1965. James Russell was granted a total of 22 patents for various elements of his compact disk system. However, the compact disk did not become popular until it was mass manufactured by Philips in 1980.