A very nice computer, when combined with Linux. Its MIPS CPU may be programmed for using assembly language, or you can use the GCC Sony gives you with the Linux kit.
Incorporates two vector units, one of which is a coprocessor of the main CPU (which is known as the Emotion Engine Core) and the other independent.
Also includes a graphics synthesizer and some very nice buses to tie all the parts together. Also (when the Linux kit is purchased), has an Ethernet card and can thus act as a server.
Sony also provides complete documentation, so if you like to hack, the PS2 is for you!