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Allen-Babcock Computing was founded in Los Angeles in 1964 by James Babcock and Michael Jane Allen Babcock to take advantage of the fast-growing market for computer time-sharing services. [1]

In 1966 the company developed "RUSH" (Remote Users of Shared Hardware), an interactive dialect of PL/I.[2] Between 1965 and 1966 they developed CPS (Conversational Programming System), a timesharing system that ran under OS/360, under contract to IBM.[3]

In 1969 Allen-Babcock held a 3 percent share of the time-sharing services market.[4]

In 1975 Allen-Babcock was acquired by Tymshare.[5]



  • Rosin, Robert (1969), "PL/I Implementation Survey", PL/I Bulletin (7): 35–42