A subsequent model named the ELECOM 120 was developed. This was essentially the ELECOM 100 (which worked on an octal system) modified for decimal operation, and given expanded memory capacity. In 1955 it was reported that there were five ELECOM 120s in operation; users included Griffiss Air Force Base, Westinghouse Aviation Gas Turbine Division and Shell Development Laboratories (now called Shell Development Emeryville). An ELECOM 50 machine also existed, though this was a purpose-built accounting machine, and an ELECOM 125 was planned, though there is no evidence this ever went into production.
