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- pronunciation:
- si
di
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abbreviation |
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abbreviation of "compact disk," a round, flat disk that sound can be recorded on and that people can listen to. Other types of information can be stored on a CD also. The information on a CD is in the same form as the information stored in a computer. It is digital information. You play a CD on a special device that has a laser in it that can "read" the information on the CD.
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