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compact disc ![click to hear : compact disc click to hear : compact disc](../../../images/speaker-vert.gif)
Digital recording medium with multiple formats (including video and audio) and variable storage capacity.
reading start ![click to hear : reading start click to hear : reading start](../../../images/speaker-vert.gif)
The track on the pressed surface is made up of a series of pits and asperities; a laser beam reads the groove from the inside out.
pressed area ![click to hear : pressed area click to hear : pressed area](../../../images/speaker-vert.gif)
Surface that contains the recording; it is coded on a spiral groove pressed into the disc.
technical identification band ![click to hear : technical identification band click to hear : technical identification band](../../../images/speaker-vert.gif)
Surface on which the disc’s identification code is engraved.