DVD-RAM

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DVDRAM stands for “Digital Versatile Disc-–Random Access Memory” is a disk specification introduced in 1996 from the DVD forum which identifies rewritable DVDRAM media as well as the proper DVD writers.
 

DVD RAM media have already been utilized in cameras in addition to computers and private video recorders since 1998.
The on-disc structure of DVD-RAM is closely related to hard disk and floppy disk technology, as it stores data in concentric tracks.
 

DVD-RAMs can be accessed just like a hard or floppy disk and usually without any special software. DVD-RWs and DVD+RWs, on the other hand, store data in one long spiral track and require special packet reading/writing software to read and write data discs. Like magneto-optical (MO) technologies.

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Martin Cooper (inventor) Inventing handheld cellular mobile phone Making world’s first handheld cellular mobile phone call. Martin “Marty” Cooper (born December 26, 1928) is an American engineer.