The IBM 1800 was a process control variant of the IBM 1130 with two extra instructions (CMP and DCM) and extra I/O capabilities. Unlike the 1130, which was a desk-like unit, the 1800 is packaged in typical IBM racks. As of February 2006 4 IBM 1800s were still in operation at the Pickering Nuclear Generating Station in Pickering, Ontario, Canada.

See also:

• IBM 1710 predecessor
• IBM System/7 sensor only successor

External links

• IBM 1130.org which has significant information about the 1130 and 1800.
• Corestore.org which recently acquired an 1800 from a Canadian power plant and reports others are still in service.
• "Evolution of Small Real-Time IBM Computer Systems" (1.25 MB PDF file), from the IBM Journal of Research and Development.
• Opendragon site has two pictures of the 1800 in operation.

IBM hardware