Up to now the biggest numbers game in biology had been run by the publicly financed Human Genome Project, which sequenced each of the three billion letters in the DNA code for a human being. "I know a neuroscientist who downloaded the Human Genome Project onto an Apple iPod," says Mark Boguski, an M.D. and Ph.D. who is a veteran of that project and who now directs the Brain Atlas Project at Allen Institute for Brain Science. "But that was 3 gigabytes, and we will be producing petabytes." Yes, your brain is very complex and this is why neuroinformatics will keep information technology vendors busy for many years to come.