Electronic analog computers.

Collection contains reports, brochures, articles, photographs, and other items related to General Electric's Power Control Simulator, ERMA (a bank automation system), AC Network Analyzer, Psychological Matrix Rotator, analog computing modules, the GE-150, Computer-Recorder for Radiosonde, and general computer operations.

Collection contains photocopies of correspondence, publications, Hoelzer's Ph.D. dissertation (in German), and drawings, all which were given to James Tomayko in preparation for an oral history and a publication. The material details Hoelzer's conception of a fully electronic analog computer which was developed in Peenemunde, Germany, during World War II. Portions of the published articles have been translated from German to English by Hoelzer.