PSP

Sony has also designed an all-new format for the medium that carries games, movies and other information for use on the PSP. Universal Media Discs are 60-mm optical discs that hold up to 1.8 gigabytes of information. Sony reports that the UMD cartridge was designed to be manufactured quickly and for lower costs than earlier, lower-capacity portable media.
Earlier game systems, both portable and console-based, have split different functions into separate processors, such as a processor for graphics and a processor for mathematical calculations. The PSP takes this concept to another level: It features a main central processing unit a media processor, a 3-D graphics processor, a security processor to prevent piracy and a final processor to manage power and conserve battery life.
Sony PlayStation 2
In one area, the PSP does not diverge from what has come before. The portable system features the buttons that are familiar to PlayStation players, and all the controls are mounted to the ergonomically designed body of the unit.