When did PSP come out

The PlayStation Portable (officially abbreviated PSP), is a handheld game console manufactured and marketed by Sony Corporation[4] Development of the console was announced during E3 2003,[5] and it was unveiled on May 11, 2004, at a Sony press conference before E3 2004.[6] The system was released in Japan on December 12, 2004,[7] in North America on March 24, 2005,[8] and in the PAL region on September 1, 2005.[9]
The PlayStation Portable is the only handheld video game console to use an optical disc format, Universal Media Disc (UMD), as its primary storage medium.[10][11] Other distinguishing features of the console include its large viewing screen,[12] robust multi-media capabilities,[13] and connectivity with the PlayStation 2, PlayStation 3, other PSPs and theInternet.[14][15]
After the release of a slimmer, lighter, remodeled version of the PlayStation Portable (the PSP-2000/"Slim & Lite") in early September 2007, sales quadrupled in the United Kingdom the following week and increased by nearly 200% in North America for the month of October.[16][17] This model was later replaced by another remodeling, the PSP-3000, which included a new screen and an inbuilt microphone. Since then, a complete redesign called thePSP Go has been released, which was sold alongside the PSP-3000. In 2011 a budget model, the PSP-E1000, was announced. The PSP line is due to be succeeded by thePlayStation Vita in late 2011/early 2012 (varying by region).