कंप्यूटर स्टोरेज के संदर्भ में, संक्षिप्त रूप DVD का पूर्ण रूप क्या है?

A flat metallic optical disk that contains a large amount of permanently stored information read optically is called a:

Which optical disc storage format superseded the standard Compact Disc (CD) by offering significantly higher storage capacity while maintaining the exact same physical diameter of 120 mm?