I'm not sure anyone here knows, but let me explain what a PSP is. A PSP stands for "Playstation portable" its a home entertainment system which you can do the following: 1) Look at photos 2) Download music, listen to music 3) Download videos, listen to video 4) Play full 3D video games All downloaded from your computer. It also has B wi-fi, so you can connect to hotspots or a router to play games online or to browse the web. Now, I'm curious. Who engineers these technological marvels? Is there a physist, sitting in the background, doing calculuations on how to design it? It has a circuirt board. How do they design this machine? Is knowledge of physics/calculus nessicary? I hope I can one day build such a machine, thanks to science. Note: It also uses a laser to bread UMD (Universal Media Discs) and has full length feature films on these discs.