CCITT No.7
Signaling System by channel semaphore of CCITT.
The CCITT No. 7 uses a language messages.
CD-I Compact disc developed by Philips and Sony constituting an additional multimedia CD-ROM, Since it can contain data, audio, graphic images and video.
You can connect a CD-I to a TV via SCART.
Photo-CD CD designed by Kodak and used for storage of photos.
CD-R CD non-rewritable.
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