A 120-mm disc used to store data, music, and video in a computer system by using laser technology is known as a(n) ____. Digital Electronics A 120-mm disc used to store data, music, and video in a computer system by using laser technology is known as a(n) ____. A. DRAM B. SRAM C. DDRAM D. CD-ROM Answer : D. Share this Share on FacebookTweet on TwitterPlus on Google+