Control Data Corporation

Control Data Corporation (CDC) was a mainframe and supercomputer company that in the 1960s was one of the nine major U.S. computer companies, a group which included IBM, Burroughs Corporation, Digital Equipment Corporation (DEC), NCR Corporation (NCR), General Electric, Honeywell, RCA, and UNIVAC.

For most of the 1960s, CDC's strength was the design work of the electrical engineer Seymour Cray who developed a series of some of the fastest mainframes in the world. During the 1970s, Cray left CDC to found Cray Research (CRI) to manufacture supercomputers. In 1988, after much financial loss, CDC began withdrawing from mainframes and sold several of its affiliated companies.

In 1992, CDC went out of business after dividing its assets between two new companies, Ceridian and Control Data Systems, Inc. The remaining affiliate companies of CDC do business as the software company Dayforce.