During the reign of the Communist Party in the former USSR, records were commonly homemade using discarded medical x-rays. These records, nicknamed "Bones", were usually inscribed with illegal copies of popular music banned by the government.
In 1979 Philips and Sony set up a joint task force of engineers to design the new digital audio disc. A Compact Disc is made from a 1.2 mm thick disc of almost pure polycarbonate plastic and weighs approximately 16 grammes.
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