California Computer Products.

California Computer Products, Inc. (CalComp) was a manufacturer of digital plotters, disk drives, and other "plug-compatible" computer equipment. Incorporated in 1958, CalComp was involved primarily with the production of plotters until about 1968, when it began selling disk drives manufactured by Century Data Systems. In 1973 CalComp filed a claim against IBM for unfair competition. The company claimed that IBM had monopolized the disk drive market through the premature introduction of new central processing units, price cuts on existing disk products, leasing policies, and other unfair practices over ten years (1963-1972).

In 1977 U.S. District Judge Ray McNichols, Central District of California, dismissed CalComp's claim. The company was denied a hearing in the 9th Circuit Court of Appeals. In 1980 Sanders Associates acquired CalComp.

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