Sony’s launched the model PSP-1001 PlayStation Portable game console in the United States in 2005. Sony updated the design in 2007, releasing the PSP-2001 and later a minor update branded the PSP-3001.The original and re-release models, colloquially known as the “Phat” and “Slim” respectively, run the same software and are largely interchangeable, but some differences exist. Writer Bio

Differences Between the Original PSP and the PSP Slim - 97