; WW2: Although the works for the latter were completed by the outbreak of war the opening was delayed, and the section, safer as it was from bombing, was used as a long, narrow, munitions factory by the Plessey company.

In 1936 Plessey obtained a number of important manufacturing licences from American companies such as, Breeze Corporation for aircraft multi-pin electrical connectors, Federal Laboratories for Coffman starters ( an explosive cartridge device used to start aircraft engines ), and Pump Engineering Services Corporation for the manufacture of Pesco fuel pumps.

The name is also used to refer to a barcode symbology developed by Plessey, which is still used in some libraries and for shelf tags in retail stores, in part as a solution to their internal requirement for stock control.

Businesses ( for example Plessey Ltd ) were allowed to use the Underground stations and unopened tunnels, government offices were installed in others and the anti-aircraft centre for London used a station as its headquarters.

During World War II, of completed tube tunnels built for the eastern extension between Gants Hill and Redbridge were used as a factory by Plessey to manufacture electronic parts for aircraft.

Instead of the programmer-visible registers used in Chicago and Plessey System 250 designs, the CAP would load internal registers silently when a program defined a capability.

During the war, the completed train tunnels at Redbridge were used by the Plessey company as an aircraft parts factory.

) The Plessey Company set up a laboratory first in a factory previously used to make briar pipes, in Litchborough, UK, and then a permanent facility at Caswell, near Blakesly, UK.

2 model which used rubber connectors and cable for the probe unit, compared to the Plessey connectors of the Mk. 1.

* The PDRM82 or Portable Dose Rate Meter and the desktop fixed PDRM 82 ( F ) version of the same meter, that were manufactured by Plessey and introduced during the 1980s, gave more accurate readings and used standard ' D ' cell torch batteries that lasted many times longer, up to 400 hours of operation.

In 1988 Plessey and The General Electric Company ( GEC ) merged their telecom units to form GEC-Plessey Telecommunications ( GPT ), the UK's leading telecommunications manufacturer.

In 1982, STC withdrew from System X and, in 1988, the telecommunications divisions of GEC & Plessey merged to form GPT, with Plessey subsequently being bought out by GEC & Siemens.

As a solution, GEC and Plessey merged their communications businesses the same year to form GEC Plessey Telecommunications ( GPT ).

for torpedo manufacture ( which were test-fired in Loch Long ) and then in the early 1970s was the scene of the Plessey sit-in.

DPNSS was an active ( and successful ) collaboration between PBX manufacturers and BT which started relatively slowly ( BT & Plessey ) but quickly snowballed with MITEL, GEC, Ericsson, Phillips and eventually Nortel all joining to create a powerful and feature rich protocol.

In 1989, it was taken over by a consortium formed by GEC and Siemens which split the assets of the Plessey group.

Aircraft components was another market into which Plessey diversified.

In 1970 the Command and Control unit was set up at Christchurch, which became the centre of the Plessey Defence Systems business.

In 1979 a major subsidiary was set up, Plessey Electronic Systems Ltd, which incorporated the three businesses and achieved sales of over £ 500 million and employed 15000 people by 1986.

Plessey Naval Systems was formed in 1986 by the merger of Plessey Marine with Plessey Displays, which had been part of Plessey Radar.

A small part of the canteen facilities ( which had five grades of service ) for all Plessey employees is visible on the right of the image, since demolished around 2010

The full acquisition of AWA-Plessey Communications, which Plessey jointly owned in Australia with Amalgamated Wireless ( Australasia ) Ltd ( AWA ) and had a similar product portfolio, resulted in penetration into the Pacific Rim market.

It is divided up into twenty wards, nine of which — Cowpen, Croft, Isabella, Kitty Brewster, Newsham and New Delaval, Plessey, South Beach, South Newsham, and Wensleydale — make up the town of Blyth.

In 1989, GEC and Siemens AG set up a joint holding company, GEC Siemens plc, to launch a hostile takeover of Plessey, which they succeeded.

Most of Plessey assets were divided between the companies ( see: Plessey # Break-up of the business ); except the 1988 founded GEC-Plessey joint venture-GPT, which was converted to a ' 60 / 40 GEC / Siemens joint venture '.

GEC Plessey Telecommunications officially renamed itself GPT, which would continue to exist merely as a legal entity and slowly loose its prominence as a brand name.

Plessey took over a company called Ameeco Hydrospace in the 1970s which specialised in building towed arrays.

A variant of Coral 66 was developed during the late 1970s / early 1980s by the British GPO, in conjunction with GEC, STC and Plessey, for use on the System X digital telephone exchange control computers, known as PO-CORAL.

In the mid-1960s, a successor to the EDSAC 2 was planned, but the move was instead made to the Titan, a prototype Atlas 2 — the latter having been developed from the Atlas Computer of the University of Manchester, Ferranti, and Plessey.

In the UK the Plessey Company produced a range of TXK crossbar exchanges, but their widespread rollout by the British Post Office began later than in other countries, and then was inhibited by the parallel development of TXE reed relay and electronic exchange systems, so they never achieved a large number of customer connections although they did find some success as tandem switch exchanges.

While MES was responsible for the majority of GEC's defence sales other GEC companies achieved defence related sales, principally GEC Alsthom, GEC-Plessey Telecommunications ( GPT ) and GEC Plessey Semiconductors.

When asked where he got the ideas for the architecture of the first microprocessor, Hoff related that Plessey, " a British tractor company ", had donated a minicomputer to Stanford, and he had " played with it some " while he was there.

What is believed to be the first adaptive routing network of computers, using link-state routing as its heart, was designed and implemented during 1976-77 by a team from Plessey Radar led by Bernard J Harris ; the project was for " Wavell "-a system of computer command and control for the British Army.

However there was an important industrial struggle during the early 1970s when the Plessey factory experienced a lengthy sit-in, objecting to its proposed closure.

( The earlier Plessey 250 was one of the few other computers with capability architecture ever sold commercially ).

The first computer to support paging was the Atlas, jointly developed by Ferranti, the University of Manchester and Plessey.

The Plessey System 250 was the first operational computer system to implement capability-based addressing, and the first sold commercially.

Manufactured by Plessey company plc in the United Kingdom in 1970, it was successfully deployed by the Ministry of Defence for the British Army Ptarmigan project and served in the first Gulf War as a tactical mobile communication network switch.

The Plessey Company plc was a British-based international electronics, defence and telecommunications company.

The Plessey company was founded in 1917 in Marylebone, central London.

Heyne later became the Managing Director and Chairman of Plessey and was one of the key figures in the development of Plessey during the 1920s and 30s.

An early customer of Plessey was a galvanising company called British Electro Chemists.