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CD

Definition:

CD stands for Compact Disc and is a popular medium for music. Music on a CD is stored digitally. Playing a CD requires a CD player or other device, such as a computer, with a CD drive.

Certain types of writeable CDs can be used by computers to store data.

Here's a word you may not know...

MMS

MMS stands for Multimedia Messaging Service and is the technology that supports sending emails, videos, audio and pictures from one mobile phone to another. In other words, video messages are delivered using MMS.