Back in the 1960s the IBM 1401 was both state of the art and an engineering marvel. It filled up an entire room and weighed thousands of pounds; in today’s money it would cost about $1.5 million. The old 1401 could perform just over 4,000 calculations per second and at the time was virtually unmatched. Nowadays, the average mobile phone has a microchip about the size of your fingernail and can










