What is PSP?

For a quick definition of PSP or Playstation Portable, we have quoted the definition from wikipedia.

The PlayStation Portable (officially abbreviated PSP) is a handheld game console manufactured and marketed by Sony Computer Entertainment.Development of the console was first announced during E3 2003, and it was unveiled on May 11, 2004 at a Sony press conference before E3 2004. The system was released in Japan on December 12, 2004, in North America on March 24, 2005,and in the PAL region on September 1, 2005.

The PlayStation Portable is the only handheld video game console to use an optical disc format, Universal Media Disc (UMD), as its primary storage media.[Other distinguishing features of the console include its large viewing screen,[ multi-media capabilities,and connectivity with the PlayStation 3, other PSPs, and the Internet. Despite the console's multimedia capabilities, sales have consistently lagged behind its main competitor, the Nintendo DS.