Guide to the Keith G. Calkins collection on Sigma systems
1969-1987; bulk 1972-1984
Doub, Bo; Hayden, Kim; Lott, Sara Chabino
Computer History Museum
10.75 linear feet in 8 record cartons and 1 small box
The Keith G. Calkins collection on Sigma systems consists of material documenting the Sigma computers developed and released by Scientific Data Systems (SDS), Xerox, Honeywell, Inc., and Telefile Computer Products. The collection holds records from all of these companies as well as the user groups focused on Sigma machines and their operating systems and software. Included in the collection are program descriptions of software designed for Sigma systems, manuals, maintenance and testing reports, conference proceedings, and records relating to Telefile Computer Products and its user group TeleXchange. Sigma machines were released and operated primarily from 1966 through 1993 and the material in this collection spans 1969 through 1987.
Calkins, Keith G. (Keith Gordon), 1958; Computer software--Development; EXCHANGE; Honeywell Inc.; Scientific Data Systems; Sigma series; Telefile Computer Products; TeleXchange; Xerox Corporation