Invented the first wearable computer in 1961 and wrote Beat the Dealer, which showed how blackjack could be beaten by card counting.
He earned his Ph.D. in mathematics from the University of California, Los Angeles.
His main research tool while working on his blackjack game theory was the IBM 704.
His family was residing in Chicago, Illinois, when he was born.
He was a devoted student of Albert Einstein's theories.