Allen-Babcock Computing was founded in Los Angeles in 1964 by James D Babcock and Michael Jane Allen Babcock to take advantage of the fast-growing market for computer time-sharing services. In 1966 the company developed "RUSH" (Remote Users of Shared Hardware), an interactive dialect of PL/I.Between 1965 and 1966 they assisted in the development of CPS (Conversational Programming System), a timesharing system that ran under OS/360, under contract to IBM. CPS was a subset of RUSH prepared by IBM with the permission of Allen-Babcock. In 1975 Allen-Babcock was acquired by Tymshare.