Elliott 900 Series Computers
Last Update: 15 January 2021
Scanned copies of Elliott issued manuals and other Elliott 900 related
documentation collected by
All the documents contained in this archive are thought to be orphaned
works and/or otherwise free of copyright restrictions. If this is not
the case, the copyright owner is invited to contact me and ask for the
copyright they hold to be acknowledged and/or have the relevant
Elliott Issued Documents
920 Coral in Outline: Summary
of facilities provided in the CAP Coral system for Elliott 920.
The Elliott 928 Graphical Display
a brochure describing the Elliott 920 Graphical Display System and its
software. The 928 display was designed to be driven by an Elliott 905
this folder contains books issued by (Marconi-) Elliott Airborne
Computing Division (ACD).
Elliott 900 Technical
Manual, Copy No. 100, Vols. 1, 2, 3,
this folder contains the manual supplied by Elliotts to customers who
purchased an Elliott 903 computer. It describes the hardware,
peripherals, operating instructions, maintenance instructions and
The content is primarily from Copy No. 100 belonging to an 8K Elliott
903 sold to The British Ceramics Research Association.
Some missing / out-of-date pages have been added from other copies of
the manual held by T.J. Froggatt and at
The National Museum of Computing.
ALGOL Design Documents:
this folder contains the Elliott 903 Algol Design Documents authored
by Don Hunter and Norman Spink.
Elliott 905 computer brochure, Marconi
Elliott Computer Systems Ltd, 1970:
summary information about the Elliott 905 computer, software and
Elliott 905 Digital
Computer System Functional Specification, Issue 2, July 1969.
Elliott 920A Fact Book: a summary of
the features of first machine
in the Elliott 900 Series.
Elliott 920C computer brochure, Elliott
Automation: summary brochure for Elliott 920C computer.
Symbolic Assembly Program:
Section of Elliott 902 Computer Programming Manual, Part 2,
Programming Languages describing assembly language for the Elliott
902 computer system (12 bit machine).
MCS 920B Computer
this folder contains drawings issued by Elliott for 903 number 62,
believed to be the 8K machine currently at the Centre for Computing
History in Cambridge.
It was originally sold the British Ceramics Research Association.
MCS 920B Manual
MCB 143, Vol. 4 Technical Manual, Copy A.139, A/275:
This folder contains parts 1-5 and Logic and Circuit Diagrams from the
MCS 920B Technical Manual (parts 1-4 ex copy A.139, diagrams ex copy
This substantially duplicates the 900 Technical Manual Volume 4, but
includes sections on Additional Store and Power Supplies which are
missing from the former,
and more numerous and detailed diagrams making this a valuable volume
when tracing and repairing hardware faults.
It also describes some of the other power supplies and I/O devices
available for the 920B when used as an embedded system.
MCS 920B Manual MCB 145, Vol. 5 Test
Program Library, Copy A/117:
Extracts from MCS 920B Manual, Vol. 5: Test Program Library MCB.145
Copy No. A/117 giving operating instructions for 920B test programs.
The original also includes program coding sheets for each of the test
programs but these have not been copies.
Additional pages relating to X.51 and store tests for the 920M have
Programming Compatibility of 920 Series Computers:
Note written by Peter Lawrence describing differences between 920A,
920B and 920M models.
WORKSHOP: Elliott booklet describing the
WORKSHOP calculator package.
Other Hardware Documents
BPRE Punch Manual:
engineering manual for Teletype BPRE paper tape punch unit.
This folder contains the engineering manual for Teletype ASR
TRM 250 Tape Reader, Elliott
technical manual for the Elliott 250 c/s paper tape reader including
operating and maintenance instructions, mechanical design drawings and
electronic circuit diagrams.
Other Software Documents
920ATC: notes by Terry Froggatt on 920ATC
Aldenham Utilities: manual for
Aldenham School Utilities.
notes on differences between BOWDLER 13/07/82 and version described in
ACD Book 120 903 Utility Software.
City and Guilds Mnemonic Code
Integer Division: notes by Terry
Froggatt on errors in the Elliott 903 Algol integer division code,
Documentation of FRED 9/2/71
a GPM-like symbol processor.
General Purpose Macrogenerator (GPM)
CJ GPM paper:
a scanned copy of Strachey’s Computer Journal paper
Resurrection GPM Article:
an article for Resurrection written by the author giving an
account of the General Purpose Macrogenerator.
ML/I & LOWL
XSTORE: summary documentation for XSTORE, a
store test program written by Terry Froggatt.
920M Construction: short article
describing construction techniques for Elliott 920M.
An advertisement for the Benson-Lehner plotter for the Elliott 903.
CCS Resurrection Elliott 903 Software Article:
an article for the CCS Resurrection magazine written by the
author summarizing the software available for the Elliott 900 series.
an article from the Computer Bulletin, December 1965 describing the
use of an Elliott 903 computer for education.
Elliott 903 Operating Notes
is a summary of entry points, data formats and error messages for the
main Elliott 900 and ACD utilities.
This folder contains a summary of the pages in the base documents
that were scanned to make this collection.