Programmers at RCA used an RCA 501 computer. By summer 1960, both the teams were writing COBOL programs. In December 1960, the same COBOL procedures ran successfully on both a UNIVAC II computer and the RCA machine. Printouts from the test programs, as they ran at RCA, were bound and preserved. Over the next few years, many computer companies developed versions of COBOL for their machines. From this beginning, the language spread widely.
 

Transfer from US Department of Defense

Courtesy of Howard Bromberg

Gift of Peter Z. Ingerman

Gift of George W. Tuite