…the chemical element of atomic number 48, a silvery-white metal…
…the SI unit of luminous intensity. One candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 × 1012 Hz and that has a radiant intensity in that direction of 1683 watt per steradian…
…a small plastic disc on which music or other digital information is stored in the form of a pattern of metal-coated pits from which it can be read using laser light reflected off the disc…
…a blank compact disc that can be recorded, erased, and rerecorded many times…
…a compact disc used as a read-only optical memory device for a computer system…
…a device for producing a compact disc by copying from an original or master copy…
…a video system in which both sound and picture are recorded on compact disc…
