British electronics, defence and telecommunications company
This article is about the British company. For the decision by the United States Supreme Court, see Plessy v. Ferguson.
Plessey
Company type
Public company
Industry
Electronics, defence and telecommunications
Founded
1917
Defunct
1989
Fate
Acquired (in 1989 by GEC/Siemens joint holding company – GEC Siemens)
Successor
GEC (1989–1999) Siemens Plessey (1989–1997) Marconi Communications (1998–2006) Siemens Communications (1998–2006) BAE Systems (1999 till date) Plessey Semiconductors (2010 till date)
Headquarters
Ilford, London, England
Key people
Sir John Clark (chairman)
The Plessey Company plc was a British electronics, defence and telecommunications company. It originated in 1917, growing and diversifying into electronics. It expanded after World War II by acquisition of companies and formed overseas companies.
It was listed on the London Stock Exchange and was a constituent of the FTSE 100 Index. In 1989, it was taken over by a consortium formed by GEC and Siemens which split the assets of the Plessey group.
The majority of Plessey's defence assets were amalgamated into BAE Systems in 1999 when British Aerospace merged with the defence arm of GEC, Marconi Electronic Systems (MES). The Plessey Microsystems division was the subject of a management buyout in 1988[1] becoming Radstone Technology, which survives today as part of Abaco Systems based in Towcester, Northamptonshire. The bulk of Plessey's telecommunications assets were acquired by Ericsson through its 2005 acquisition of Marconi Communications, a successor company of GEC.
^"VME BOARD BUILDER PLESSEY MICROSYSTEMS BECOMES RADSTONE IN MANAGEMENT BUYOUT". Techmonitor. 26 May 1988. Retrieved 30 October 2023.
The Plessey Company plc was a British electronics, defence and telecommunications company. It originated in 1917, growing and diversifying into electronics...
Siemens Plessey was the name given to the Plessey assets acquired by Siemens in 1989. Today most of these units are part of BAE Systems while some units...
GEC Plessey Telecommunications (GPT) was a British manufacturer of telecommunications equipment, notably the System X telephone exchange. The company...
Plessey Code is a 1D linear barcode symbology based on pulse-width modulation, developed in 1971 by The Plessey Company plc, a British-based company....
The Battle of Plassey was a decisive victory of the British East India Company, under the leadership of Robert Clive, over the Nawab of Bengal and his...
plc (GEC), was founded in August 1998 through the amalgamation of GEC Plessey Telecommunications (GPT) with other GEC subsidiaries: Marconi SpA, GEC...
Divisions of Plessey in 1989 (others acquired by its partner in the deal, Siemens AG, to meet with regulatory approval). Plessey Avionics Plessey Naval Systems...
Homer Adolph Plessy (born Homère Patris Plessy; 1858, 1862 or March 17, 1863 – March 1, 1925) was an American shoemaker and activist, who was the plaintiff...
Plessey Woods is a country park situated on the north bank of the River Blyth, in Northumberland. The park is accessed from the A192 in the village of...
Plessey System 250, also known as PP250, was the first operational computer to implement capability-based addressing, to check and balance the computation...
(also known as Modified Plessey) is a barcode symbology developed by the MSI Data Corporation, based on the original Plessey Code symbology. It is a continuous...
Plessey railway station served the hamlet of Plessey, Northumberland, England from 1859 to 1962 on the East Coast Main Line. The station opened in July...
Systems Division of the Plessey Company, then it became Plessey Marine Research Unit, and Plessey Marine, before becoming Plessey Naval Systems, producing...
aircraft), which is the former Abbey Works site of Plessey Dynamics (Mechanical Systems) and Plessey Aerospace. Raymarine Marine Electronics (owned by...
Centre was a solid-state physics optoelectronics research centre of the Plessey company at Caswell, near Towcester, Northamptonshire, England. It was opened...
This is a list of microprocessors. Nios 16-bit (soft processor) Nios II 32-bit (soft processor) List of AMD K5 processors List of AMD Athlon processors...
a £2.75m contract, Plessey supplied the secondary radar system for the new West Drayton site, to operate from mid-1969, on Plessey Digitrace screens....
Milk.[citation needed] X-Fab UK (semiconductor fabrication plant, former Plessey Semiconductors) is next to the A386 Bickleigh Cross roundabout; nearby...
and continuing sales into the 1970s after the division was purchased by Plessey in 1965. It was one of the company's successful heavy radar projects, winning...
professor of neuropsychology at the University of Bristol; Roger Mathias of Plessey Radar and the Multi-function Electronically Scanned Adaptive Radar (MESAR)...
Global Information