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Calcomp Technology, Inc., usually known as Calcomp, was a company best known for its Calcomp plotters.


It was founded as California Computer Products, Inc in 1959, located in Anaheim, California.

Sanders Associates, Inc., purchased Calcomp in 1980. In 1986 Sanders Associates was purchased by the Lockheed Corporation, and merged into Lockheed's Information Systems Group. Lockheed kept CalComp as a brand name.

Calcomp Technology shut down its operations in 1999, and transferred different product lines to various other companies, some of whom continue to use the "Calcomp" or other "Cal-" trademarks:[1]

  • Technical Services and spare parts: CalGraph Technology Services, Inc.
  • TechJet 5500 Large Format Inkjet Plotter / Printer Information: CalComp Graphics.[2]
  • Digitizer, Tablets and scanners: GTCO CalComp, Inc.
  • Film Imaging Systems: EcoPro Imaging (now part of OYO Instruments)
  • Cutter and sign maker products: Westcomp


It produced a wide range of plotters (both drum and flat-bed), digitizers, thermal transfer color printers,[3] thermal plotters[4] (InfoWorld June 13, 1994 p. 40) and other graphic input/output devices. In 1969, it produced about 80% of all plotters worldwide.

It also produced IBM plug compatible (PCM) disk and tape products. The disk products ranged from 2311 (CD-1) through 3350 equivalents. The tape product was a 3420 equivalent.

Calcomp acquired Talos and Summagraphics, which had acquired Houston Instruments.

Houston Instruments[edit]

Houston Instruments was another manufacturer of pen plotters. They used the DMPL plotting control language. They competed with Hewlett Packard plotters such as the HP 7470. They were purchased by Summagraphics.[5]

  • DMP-29
  • DMP-40, DMP-41, DMP-42
  • DMP-50, DMP-51, DMP-51MP, DMP-52, DMP-52MP, DMP-55, DMP-56
  • DMP-60,[6] DMP-61, DMP-61DL, DMP-62, DMP-62DL, DMP-63, DMP-64, DMP-65C
  • DMP-161, DMP-162, DMP-162R


  1. ^ "Calcomp company and contact information". Retrieved 2015-01-06.
  2. ^ "CalComp Graphics". Archived from the original on 2014-12-17. Retrieved 2015-01-06.
  3. ^ Calcomp (1991). Colormaster Plus: Models 6603PS and 6613PS User's Guide. CalComp. Retrieved 2015-01-06.
  4. ^ InfoWorld. InfoWorld Media Group, Inc. p. 111. ISSN 0199-6649. Retrieved 2015-01-06.
  5. ^ Drivers for Summagraphics tablets Archived 2011-11-21 at the Wayback Machine
  6. ^ "Houston Instruments DMP-60 Plotter - YouTube Demo video". Retrieved 2015-01-06.

External links[edit]