Computer professionals must have good reasoning and logical problem solving abilities, be observant, alert to detail and tenacious in pursuing problems to completion. In 1939, Bell Phone Laboratories completes this calculator, designed by scientist George Stibitz. In 1940, Stibitz demonstrated the CNC at an American Mathematical Society conference held at Dartmouth College. Stibitz surprised the group by performing calculations remotely on the CNC (situated in New York City) utilizing a Teletype terminal linked by way of to New York over particular telephone lines. This is likely the first example of remote access computing.