Can you re-create the processing power of a 150-foot-wide computing behemoth on a single chip? That was the challenge for electrical engineering students at the University of Pennsylvania: to build ENIAC on a chip. The chip had to include all the processing units of the original ENIACaccumulators, cycling units, cycle tables, and so onin electronic format rather than as mechanical devices. The resultant chip measured 7.44 by 5.29mm and contained about 174,569 transistors. This site tells the story.