DVD-RAM (DVD–Random Access Memory) is a disc specification presented in 1996 by the DVD Forum, which specifies rewritable DVD-RAM media and the appropriate DVD writers. DVD-RAM media have been used in computers as well as camcorders and personal video recorders since 1998.
The term DVD-RAM is a misnomer based on the false assumption that RAM means "read-and-write memory"; the opposite of ROM (Read-Only Memory). However, RAM stands for Random Access Memory (computer chips) and DVDs cannot inherently use the random access method.
Compared with other writeable DVDs, DVD-RAM is more closely related to hard disk technology, as it has concentric tracks instead of one long spiral track. Unlike the competing formats DVD+R, DVD-R, DVD+RW and DVD-RW, special DVD burning software is not required to write or read DVD-RAMs on a computer. DVD-RAMs can be accessed like a usual floppy disk or hard drive.
Microsoft Windows XP supports DVD-RAM operation directly, while earlier versions of Windows require device drivers or the program InCD.
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