The model number of the first PlayStation Portable was PSP-1000.
Sony released the original PSP-1000 in Japan on December 12, 2004, followed by North America in March 2005 and PAL regions later that year. It was Sony’s first handheld console and introduced PlayStation software, multimedia features, and portable gaming to a new audience.
The PSP-1000 is often nicknamed the “PSP Fat” because it is thicker and heavier than later revisions. It includes a 4.3-inch LCD screen, a UMD drive for games and films, Wi-Fi, and 32 MB of internal system memory. Games and other media could also use Memory Stick PRO Duo cards for storage.
The later PSP-2000, released in 2007, was slimmer and lighter, while the PSP-3000 added an improved display and microphone. The PSP Go used the N1000 designation and removed the UMD drive, and the PSP Street used E1000. Those names can make the model line confusing, but PSP-1000 is the canonical designation for the original hardware generation.