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UMD

(Universal Media Disc) The optical disc used in Sony's PlayStation Portable (PSP). Officially the ECMA-365 standard, a UMD is a read-only medium for games and movies. Video is encoded in H.264, and audio is encoded in ATRAC3plus. See PlayStation.




A UMD Cartridge
Single-layer UMDs have a capacity of 900MB, and dual-layer cartridges hold 1.8GB. The DVD regional coding is used for UMD movies, but not for games. (Image courtesy of Sony Computer Entertainment.)






PlayStation

A video game console from Sony that was introduced in the U.S. in 1995. CD-ROM based and using a 32-bit MIPS CPU, the original PlayStation was the first of a family of desktop and handheld units. A more advanced DVD-based PlayStation 2 (PS2) debuted in 2000 along with the PS one, a smaller model that could be used in cars with a power adapter. See PS one and PS2.

The PlayStation 3 (PS3), introduced in late 2006, used a considerably faster processor and high-definition Blu-ray drive (see PS3). The PlayStation 4 came out in 2013 (see PS4).

The Portable PlayStation
A handheld PlayStation Portable (PSP) came out in 2005 that uses Sony's Universal Media Disc (see UMD) and Memory Stick PRO Duo card for storage. The PSP also plays music and videos and displays photos. See video game console, PS2 and PS3.




The Original PlayStation
This was the model that started PlayStation mania. It held its own for five years until Sony introduced the PS one and PS2.






First Handheld Model
A decade after the original PlayStation was launched, Sony introduced the first handheld model. The PlayStation Portable (PSP) also plays music and videos and displays photos. (Image courtesy of Sony Computer Entertainment.)






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