Microdata Corporation

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Microdata Corporation was an Irvine, California-based computer company that

  • was taken over by its international distributor CMC Leasings (December 1969),
  • which in turn was taken over in 1983 by McDonnell Douglas Corporation (March 1983),
  • MDIS took it off their hands (October 1997)
  • and it is now part of Northgate Information Solutions (April 2000).[1][2]

The company was initially formed as a hardware company[3].

Independently, TRW, in fulfillment of a mid-1960s government contract to build software to track inventory, developed a database system named Generalized Information Retrieval Language System (GIRLS). As a public domain item, a developer named Richard Pick was free to use it as the basis of a subsequent work, which eventually became the Pick operating system. The initial version was designed to work on hardware produced by Microdata, which introduced the combination under the name Reality in 1974.

Since the software part of Reality was based on public domain work, Pick considered himself free to develop versions for other systems. A lawsuit followed. The ruling was that both Microdata and Pick could each consider themselves owners of the software.

McDonnell Douglas bought Microdata but eventually sold it off. Meanwhile, Pick revised his software to make it more portable, resulting in many systems able to run what now was called the Pick Operating System.

Many implementations followed: Prime Computer's Prime INFORMATION was done as far back as 1979 as a combination of FORTRAN and Assembler.

ENGLISH (programming language)[edit]

One way of accessing data under some of the Pick implementations had a number of names:[4]

  • ACCESS -- The data retrieval language used to produce reports with English-like sentences.
  • It was also called

Microdata hardware[edit]

There were 3 computer models offered by Microdata:

  • Microdata 800
  • Microdata 1600[5]
  • Microdata 3200[6]

The original machine was a Microdata 800 microcomputer first made in 1969. This computer was licensed to the French company Intertechnique who sold it in Europe under the name Multi-8. It was particularly in use in nuclear power stations, research applications (such as crystallography and biology) and process control.

The Microdata 1600 was an updated version of the 800 processor (commercialized under the name Multi-4 by Intertechnique).

The original development of Reality was done on the Microdata 800. The first Reality system was based on the 1600 and was sold commercially in 1973. The unique feature of the early Microdata processors was that the microcode was accessible to the user and allowed the creation of custom assembler level instructions. The Reality system design made extensive use of this capability.

The Microdata 3200 was developed in 1974 and was a 16 bit microprogrammed system designed to implement a high level language similar to IBM's PL/I language. It was designed to a more specific purpose, but still retained a great deal of flexibility in the firmware to allow for very complex microprogrammed architectures to be supported.

Further reading[edit]

  • Dick Elleray (16 July 1986). "Project Management Bulletin 1986/09 - "The Reality Operating System Revealed"" (paper original)|format= requires |url= (help). 1986/09. Project Management Group, McDonnell Douglas Informations Systems Group. |access-date= requires |url= (help)
  • John Luttrell (Microdata 1979 - Novadyne 1994). "Microdata Alumni website - Microdata-Alumni.org". Microdata Alumni website - history of Microdata, McDonnell Douglas Information Systems Group, and Novadyne Computers Systems, Inc. Includes photos, video, articles, literature, etc.
  • Reiter, Reinhold ; Sladkovic, Rudolf ; Carnuth, Walter Atmospheric Aerosols between 700 and 3000 m above Sea Level. Part V. A Study of the Effects of Atmospheric Fine Structure Characteristics on the Vertical Distribution of Aerosols[permanent dead link] a technical report of the Fraunhofer-Gesellschaft on atmospheric physics where a Multi-8 was used for performing computations (July 1971)

External links[edit]




  1. ^ according to a British regulatory agency.
  2. ^ "Northgate Information Solutions Uk Limited". April 2013.
  3. ^ "General Overview of Classic Pick - a short history". 1995.
  4. ^ "PICK BASIC - Glossary of Pick Terms".
  5. ^ "Microdata PCB 1600 Photos".
  6. ^ Agrawala, Ashok K.; Rauscher, ?Tomlinson G.; Ashenhurst, ?Robert L. (2014). Foundations of Microprogramming: Architecture. ISBN 1483215873.