Control Data Corporation
American computer company that became a pioneer in high-performance mainframes, supercomputing, peripherals, and technical education.
Last updated August 21, 2026
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Overview
Control Data Corporation (CDC) was an American computer company established in 1957 by former Engineering Research Associates personnel who had worked within the wider Remington Rand and Sperry Rand computing organizations. It became one of the principal United States computer manufacturers of the 1960s, competing with IBM and other large vendors in mainframes, peripherals, computing services, and education. Its identity was shaped especially by the engineering work of Seymour Cray, whose designs placed CDC at the forefront of high-performance computing. CDC initially sold subsystems, including magnetic-drum memory equipment, before producing complete computers. Its CDC 1604, introduced in 1959, was a fully transistorized scientific computer and an important early commercial success. The smaller CDC 160A broadened the company’s reach into lower-cost computing, while the CDC 3000 family extended the company’s mainframe business. CDC’s most influential product was the CDC 6600, introduced in 1963. Its central processor, peripheral processors, advanced transistor circuitry, and scientific orientation made it dramatically faster than contemporary general-purpose systems and established the term “supercomputer” in common industry use. The CDC 7600 followed as a more powerful successor and reinforced the company’s reputation for technically ambitious systems. The company also pursued a broad hardware strategy. Under William Norris, CDC sought to offer products corresponding to IBM’s peripherals while competing on speed and price. It developed or acquired businesses covering tape transports, card readers and punches, printers, magnetic storage, optical character recognition, and related equipment. Acquisitions and joint ventures brought companies such as Bridge Engineering, Rabinow Engineering, and interests associated with Computer Peripherals, Inc. into the company’s orbit. CDC later acquired a controlling interest in Centronics and consolidated parts of its peripheral activities there. Some diversification efforts, including OCR and service bureaus, proved less successful than the core computer business. CDC also operated the Control Data Institute, an international vocational and technical training network. By the late 1970s, the institute had dozens of learning centers and served thousands of students, reflecting Norris’s view that computing growth depended on trained operators, programmers, and technicians. Seymour Cray left CDC in the early 1970s to establish Cray Research, creating a major technological and competitive break. CDC continued developing large systems, including the Cyber line, but the economics of mainframe manufacturing became increasingly difficult as IBM strengthened its position and newer computing models expanded. CDC’s financial condition deteriorated during the 1980s. In 1988 it began withdrawing from the mainframe business and selling or separating affiliated operations. The company ultimately ceased operations as a unified business in 1992, dividing substantial assets between Ceridian and Control Data Systems. Several successor activities later evolved separately, including businesses that became associated with the software company Dayforce. CDC’s lasting historical importance rests on its role in scientific computing, vector and high-performance system design, peripheral innovation, and the development of the modern supercomputer industry.
History
CDC’s roots lay in wartime code-breaking and communications engineering. In 1942 the U.S. Navy assembled Communications Supplementary Activity–Washington, a group that included engineer Seymour Cray and cryptographer William Norris. After the war, the Navy sought to preserve this technical capability through a private contractor. John Parker consequently established Engineering Research Associates in 1946 in St. Paul, Minnesota, with former CSAW personnel and naval support. ERA worked on magnetic-drum storage and programmable computing systems, including the Atlas project. Financial and organizational pressures led Parker to sell ERA to Remington Rand in 1952. Remington Rand later became part of Sperry Rand, where the former ERA engineers were combined with UNIVAC activities. Friction between the groups and delays in computer projects contributed to the departure of several engineers. In 1957, William Norris and colleagues founded Control Data Corporation in Minneapolis. Cray joined the new company in 1958 after completing work on a naval system, becoming its principal designer. CDC first sold computer subsystems, particularly magnetic-drum memory equipment. Cray then designed the CDC 1604, released in 1959. Its transistorized architecture provided substantially greater reliability and performance than vacuum-tube competitors. The CDC 160A, introduced in 1960, offered a smaller and less expensive configuration, and the CDC 3000 family followed in 1964. During this period, CDC expanded its peripheral capabilities through internal development, acquisitions, and partnerships. Its portfolio included tape transports, card equipment, printers, disk systems, OCR equipment, and computing services. Cray’s most consequential work was developed at a specially authorized laboratory in Chippewa Falls, Wisconsin. There, Cray, Jim Thornton, Dean Roush, and their team pursued a radically faster scientific computer. The result was the CDC 6600, introduced in 1963. Its central processor delegated input/output work to peripheral processors, allowing the main CPU to concentrate on scientific calculations. The design’s performance made CDC a leading supplier to research institutions, government agencies, and technically demanding customers. The CDC 7600 continued this high-performance direction, while later Cyber systems extended CDC’s large-scale computing family. CDC’s strategy under Norris was broader than supercomputers. He wanted the company to reach the scale required to challenge IBM and therefore pursued a “full product line” approach. CDC developed peripherals internally and acquired specialist companies. Bridge Engineering strengthened card equipment; Rabinow Engineering brought OCR expertise; printer activities developed through relationships involving Holley and National Cash Register; and Computer Peripherals, Inc. combined manufacturing and development interests with other industry participants. CDC also entered computer services and built the Control Data Institute into an international technical training network. Some of these businesses produced useful capabilities but did not match the profitability or prestige of CDC’s mainframe engineering. Cray left in the early 1970s to found Cray Research. CDC remained an important computer manufacturer, but competition, changing customer requirements, the rise of distributed and smaller systems, and the cost of maintaining a broad hardware portfolio weakened its position. During the 1980s the company experienced major financial losses. It sold or separated several operations and in 1988 began withdrawing from the mainframe market. In 1992 CDC’s assets were divided principally between Ceridian and Control Data Systems. The original corporation therefore disappeared, although successor businesses continued operating in software, services, and related fields. CDC’s historical legacy is its decisive contribution to scientific computing and the commercial development of supercomputers.
- 1992
CDC is divided into successor companies
[1]The corporation’s assets were split principally between Ceridian and Control Data Systems.
- 1988
Mainframe withdrawal begins
[1]CDC responded to losses by reducing its mainframe business and divesting affiliated operations.
- 1982
CDC acquires control of Centronics
[1]CDC took a controlling interest in the printer manufacturer and merged Computer Peripherals, Inc. into it.
- 1976
CDC exits its Rockville OCR operation
[1]CDC closed the Rabinow Engineering plant and withdrew from that OCR manufacturing activity.
- 1972
Cray Research is founded
[5]Seymour Cray left CDC and established an independent supercomputer company.
- 1964
CDC 3000 family appears
[1]The company expanded its mainframe range with systems derived from the 1604 design approach.
- 1963
CDC 6600 is introduced
[2]CDC launched a landmark high-performance system that established its supercomputing reputation.
- 1960
CDC 160A is introduced
[7]The company launched a smaller, lower-cost computer often recognized as an early minicomputer.
- 1959
CDC 1604 is released
[6]CDC introduced a fully transistorized mainframe for scientific and institutional computing.
- 1958
Seymour Cray joins CDC
[4]Cray became CDC’s chief designer and began developing its transistorized computer systems.
Products and positioning
A technically ambitious high-performance computing pioneer that challenged IBM in scientific mainframes and developed a broad supporting hardware and services portfolio.
Transistorized mainframe · 1959
CDC 1604
Introduced in 1959, the CDC 1604 was CDC’s first major complete computer product. It used transistor circuitry rather than vacuum tubes and targeted scientific, government, and institutional users. Its design established CDC as a credible systems manufacturer and provided the technical foundation for subsequent product families.
Minicomputer · 1960
CDC 160A
The CDC 160A was a smaller and less expensive 12-bit computer derived from the company’s early architecture. Its compact office-style packaging was unusual for the period and helped demonstrate that computing systems could be deployed outside the largest centralized installations.
Mainframe computers · 1964
CDC 3000 series
The CDC 3000 family extended the company’s earlier architecture into a broader range of commercial and scientific mainframes. These systems helped CDC serve customers who needed more general-purpose capability than the specialized high-performance machines provided.
Supercomputer · 1963
CDC 6600
The CDC 6600 was CDC’s defining product. Its fast central processor, multiple peripheral processors, sophisticated compiler environment, and high-speed memory and storage arrangements were optimized for scientific workloads. It substantially outperformed contemporary systems in appropriate applications and became a benchmark for supercomputer design.
Supercomputer · 1969
CDC 7600
The CDC 7600 continued Seymour Cray’s high-performance design philosophy with greater speed and more advanced internal organization than the 6600. It served demanding scientific and government workloads and strengthened CDC’s position at the leading edge of large-scale computing.
Mainframes and supercomputers · 1970
CDC Cyber series
The Cyber name covered later CDC large computer systems and related operating environments. Cyber products extended CDC’s mainframe and high-performance computing business into the period when the company was facing stronger competitive and economic pressure.
Technical education · 1960
Control Data Institute
The Control Data Institute was CDC’s vocational and technical education network. It trained computer operators, programmers, and technicians through learning centers in multiple countries and represented a major non-hardware element of CDC’s business strategy.
Brand decisions
1992
Divide CDC’s assets among successor companiesStrategyBackground
The remaining corporation was no longer viable as an integrated computer manufacturer.
Action taken
Assets were divided principally between Ceridian and Control Data Systems.
Aftermath
Control Data Corporation ceased to operate as a unified company, while successor businesses continued in software and services.
1988
Withdraw from the mainframe businessStrategyBackground
CDC had suffered substantial financial losses amid intense competition and changing computer-industry economics.
Action taken
The company began reducing mainframe activities and selling or separating affiliated businesses.
Aftermath
The move preceded the 1992 division of CDC’s assets and the end of the original corporation.
1972
Respond to Seymour Cray’s departureStrategyBackground
Cray left CDC to create Cray Research, taking a central figure in the company’s supercomputer engineering story into a new independent business.
Action taken
CDC continued developing and marketing high-performance systems, including later Cyber products, while Cray Research became a separate competitor and industry leader.
1962
Authorize Seymour Cray’s remote design laboratoryStrategyBackground
Management pressure increased as Cray’s ambitious high-performance computer project extended over several years. Cray indicated that he needed autonomy and a separate environment to continue the work.
Action taken
William Norris allowed Cray and his team to work from a dedicated laboratory in Chippewa Falls, Wisconsin.
Aftermath
The arrangement enabled development of the CDC 6600 and became an influential model of high-autonomy engineering organization.
Recent events
- 1992
Control Data Corporation ceases unified operations[1]
M&A
CDC’s assets were divided between Ceridian and Control Data Systems, ending the company as an operating corporate entity.
- 1988
CDC begins withdrawing from mainframes[1]
Bankruptcy
After substantial losses, CDC started reducing its mainframe activities and selling or separating affiliated businesses.
- 1972
Seymour Cray leaves CDC to form Cray Research[4]
Leadership change
Cray departed CDC and founded Cray Research, which became a major independent supercomputer company.
- 1963
CDC launches the CDC 6600[2]
Product launch · Product generation
The company introduced a high-performance scientific computer widely regarded as one of the first supercomputers.
- 1959
Control Data introduces the CDC 1604[1]
Product launch · Product generation
CDC released its first major mainframe, a fully transistorized system that became an important early product for the company.
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