The Lyons Electronic Office - LEOII/3 electronic programmable storage computer,
installed and first demonstration run in May 1958,
The first commercially sold computer.
Hardware:
Tape head reader unit, with split part operation and monitor controls for 'run' and 'halt', blue-painted faceplate and chrome removing pull;
Memory carriage unit, with 11-valve lineup (one missing, one vacuum loss), rectangular chassis with resistor boards below and rack hoops at each end;
Frequency Monitor Unit with CRT display, with square chassis and vision mixer valves on top, used in conjunction with the delay tube box;
CRT tube from the main control console, one of three tubes from the desk, (vacuum lost, gun end cracked);
A LEO magnetic tube drum, lockable lids and the tape protected in reel core.
Paperwork:
A series of circuit diagram blueprints covering the magnetic drum reader, amplifier, storage and input circuits, all numbered and some with pencil annotations on slight changes to circuit paths; two punch cards, both processed by LEOII/3, showing punched number columns;
Newspaper 1 - The Review News, July 1957, the article covering the installation of LEOII/3 at Stewart & Lloyds;
Newspaper 2 - The Steel News, 15 July 1971, covering, surprisingly briefly, the LEOII/3 decommissioning task and the farewell message it printed;
The Farewell Message - the actual printout as churned through LEOII/3's printer rollers, now framed - in full layout it says:
LEO II
13 YEARS
58-71
WORKED
70000 HOURS
USED
124000000 CARDS
2600 PAPER TAPE
PRODUCED 8800000 PAYSLIPS
3640000 INVOICES
NOW IT IS TIME TO CLOSE
23 JUNE 71
Originally occupying an area measuring 80' x 32' 6", it was switched off, replaced and super-seeded by an IBM 360. - the memory unit 26.1/2in. (67cm) wide
