Alan Freedman -- The Computer Language Company - Computer Desktop Encyclopedia
Computer Desktop Encyclopedia
Longest-Running Tech Reference on the Planet

A CDE Definition

You'll love The Computer Desktop Encyclopedia (CDE) for Tech Term of the Day (TTOD)


Series 39

A family of mainframes from ICL introduced in 1985 that superseded the Series 2900. The Series 39 was superseded by the Trimetra line in 1997. See ICL.


(International Computers Ltd., London) The former name of Fujitsu Services, the European-centered arm of the global Fujitsu Group and one of the leading IT services companies in Europe, the Middle East and Africa. ICL was rebranded under its parent's umbrella in mid-2002 and continues its customer focus in the financial services, telecom, retail, utility and government markets.

ICL was originally formed in 1968, following a decade of frantic mergers by major British electronics firms, largely in response to increasing U.S. dominance of global IT markets (primarily IBM) and by the lack of funding at home for competitive R&D. The dominant survivor of the 10-year scramble was International Computers and Tabulators (ICT), which later merged with Elliott-Automation, English Electric (EE), Lyons Electronic Office (LEO) and Marconi, to become ICL.

In 1998, the company formed an alliance with Microsoft to develop models for community-based learning, part of the UK National Grid for Learning Project. Under the alliance, ICL developed and marketed new systems running on Windows NT. For more information, visit

Early Mainframe
This was a typical ICL mainframe installation in the mid-1960s. The 1904 mainframe cabinets are on the extreme left. (Image courtesy of Chris P. Burton.)

On the Test Floor
In late 1975, these 2980 machines were being tested prior to shipping. The screens show that TOSD, the Test Operating System, was running. (Image courtesy of Chris P. Burton.)

Personal Use Only

Before/After Your Search Term
serial printerSeries 60
Serial SCSIseries mode
serial transferseries mode surge suppression
serial transmissionserif
serial vs. parallelSerious Radio
serializer/deserializerserpentine recording
Series 1900servelet
Series 2900server

Terms By Topic
Click any of the following categories for a list of fundamental terms.
Computer Words You Gotta KnowSystem design
Job categoriesUnix/Linux
Interesting stuffPersonal computers
InternetIndustrial Automation/Process Control
Communications & networkingAssociations/Standards organizations
HistoryDesktop publishing
ProgrammingHealthcare IT
System design