Text Box: The Computer Conservation Society is carrying out a major exercise ( Our Computer Heritage) to secure on record as much information relating to early British Computers as possible. One of the groups headed up by Virgilio Pasquali is covering ICT/ICL 1900. This Website is intended to make visible the papers already written, the information available and the background documents consulted, to facilitate comments and additional inputs by colleagues The ICT/ICL 1900 Range

“I must say we must have been very brave in those far off days without realising the full implications”.

A.C.L. Humphreys CBE (June 1996)

Text Box: • The 1900 Range – Index 1-1900 Architecture and System Description 1.1 - How the ICT 1900 Series evolved. 1.2 - The ICT 1900 Range in 1966 1.3- ICT 1900 Range Architecture 1.3.1 – System Architecture 1.3.2- Standard Interface 1.3.3- 1900 Executive 1.3.4 – The 1900 Range Order Code 1.3.5 – FP6000 Processor Data Flow 1.3.6 - Span of the Range 1.4 - Hardware technology in the ICT/ICL 1900 Range 2- 1900 Performance and Competitive Position 2.1- 1900 at the start- FP 6000 performance 2.2- Performance of ICT 1900 in 1966 2-3 Performance of ICT / ICL 1900 Series (All Models) and 2903/ME29 2.4 ICT 1900 competitive position 3-1900 Software 3.1 – The FP 6000 Software (Before the 1900 Range) 3.2 - ICT 1900 Range Software – The Start 3.3 – Programming Aids (Software) in 1966 3.4- The Operating Systems (George). 3.5- ICT/ICL 1900 Software - Two views from the Board 3.6 ICT/ICL 1900 Software in 1972 4-1900 Range in the Market 4.1 – 1900 Road Map 4.2- Approx. Quantities delivered. 4.3– Customers list and Applications 4.3.1- The 1900 Users Group 4.3.2- Some Customers Details 5-1900 Acknowledgements and References

 

 

“The range was undoubtedly a success story for ICT and later ICL. While many people and groups contributed, its success owes a great deal to the skill and dedication of engineering teams throughout the company.”

The strong engineering tradition so pervasive in the company was highlighted when, in November 1998, on the 50th Anniversary of ICL first computer, the Chairman of ICL awarded 8 Gold Medals for outstanding contribution to the development of ICL mainframe systems. A few of the 1900 designers were amongst the 8 Gold Medals.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Edited by Virgilio Pasquali

(2004)