Deep Blue + IBM programmers + team of chess grandmasters they also had assisting. In general I would not give Kasparov's claims that much credit if not for the fact that after the match IBM immediately dismantled the machine which just looked absurdly guilty, especially given the historic value of the machine.

In a normal world this is hardware you should still be able to go play a game against at either at some IBM building, the Smithsonian, or whatever.