Electronic Associates, Inc. (EAI) was founded in 1945 by Lloyd F. Christianson and Arthur L. Adamson and began manufacturing analog computers in 1952.Their systems were used by NASA to develop space probes and simulate physical systems.As digital technology matured, they began production of hybrid digital/analog systems, such as the EAI680 with 156 amplifiers, diode function generators and servo-controlled potentiometers to control input parameters. Other notable employees include Hans Witsenhausen and board member Everard Mott Williams.