Philips Research Laboratories, Sony Corporation, Tokyo / Digital Compact Disc technology Dec 12 Written By Dahrell Williams Philips Research Laboratories, Sony Corporation, Tokyo / Digital Compact Disc Polycarbonate plastic 1970s ( Released 1982)Diam. 4 3/4" (12.1 cm) Dahrell Williams
Philips Research Laboratories, Sony Corporation, Tokyo / Digital Compact Disc technology Dec 12 Written By Dahrell Williams Philips Research Laboratories, Sony Corporation, Tokyo / Digital Compact Disc Polycarbonate plastic 1970s ( Released 1982)Diam. 4 3/4" (12.1 cm) Dahrell Williams