PSP Go
The PSP Go was revealed on May 30, 2009, in the June episode of the PlayStation Network online magazine Qore and was later officially announced on June 2, 2009, at E3 2009. The PSP Go features Bluetooth functionality, a smaller 3.8-inch (97 mm) screen and weighs 43% less than the original PSP. Instead of the UMD drive as found on previous models, the PSP Go has 16 GB of internal flash memory and a Memory Stick Micro port that accepts cards up to 16 GB. Currently, the PSP Go has a max memory of 32 GB, but the M2 memory can be increased in firmware updates. Games must be downloaded from the PlayStation Store. The sliding mechanism on the screen hides the main face buttons and the analog 'nub' when not in use. With the release of the PSP Go, most future PSP games will also receive a PlayStation Store release, whereas only a handful of games were available before.
Sony announced in April 2011 that it was ceasing production of the PSP Go to focus resources on developing the PlayStation Vita (then known as the NGP), but shortly thereafter SCEA clarified that the PSP Go would continue to be produced for the North American market.
Read more about this topic: PlayStation Portable