Abbreviation for Digital Versatile Disc
An optical disc standard with a large storage capacity, defined for storing multimedia data such as video and music.
Since it was originally developed as a replacement for videotape, it was referred to as a Digital Video Disk; however, it can also be used for computer-related purposes, and therefore it is now referred to as a Digital Versatile Disk, which means multi-purpose. However, the term Digital Video Disk is also still used for video-related purposes.
The standard includes DVD-R and DVD+R, which can be written on only once, and DVD-RW, DVD-RAM, and DVD+RW, which can be written on multiple times. In addition, there are many types, including single-layer and double-layer types, as well as double-sided single-layer and double-sided double-layer types, although they are rarely used. Therefore, it is necessary to select the type according to compatibility and intended use. The maximum recording capacity is 4.7GB for single-sided single-layer recording, 8.5GB for single-sided double-layer recording, and 9.4GB for double-sided single-layer recording.