According to my sources, the term "PC Engine" came from the fact that the unit used just that...a PC "engine". The processor, being a 6502 (though highly modified), was the processor that powered a great number of PCs of the time. And of course, an engine powers a car as well as many other things, so why not power a computer? Thus, "PC Engine". Quite honestly, it's a stupid name, but it worked...just like the Wii has one of the dumbest names ever devised, yet it works.