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GEC operating system introduced in 1977
OS4000 is a proprietary operating system introduced by GEC Computers Limited in 1977 as the successor to GEC DOS, for its range of GEC 4000 series 16-bit
OS4000
the file without the need to read and rewrite the entire file. OS4000 for GEC's OS4000 operating system, on the GEC 4000 series minicomputers A FAT12
List_of_file_systems
1925–1939 lightbulb cartel
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Phoebus_cartel
Series of 16/32-bit minicomputers
for real-time systems, providing a filesystem and swapping facilities OS4000: a multi-user system supporting batch and interactive use, and transaction
GEC_4000_series
Telecommunications technology company
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Marconi_Communications
British electrical engineering company
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Metropolitan-Vickers
Tandem Nonstop OS v1 Thoth 1977 1BSD AMOS KERNAL OASIS operating system OS68 OS4000 RMX-80 System 88 (Exec) System Support Program (IBM System/34 and System/36)
Timeline_of_operating_systems
project management software. In the mid-1970s, GEC Computers was working on OS4000, a more advanced operating system for the GEC 4000 series. This opened up
GEC_Computers
Defence arm of the defunct General Electric Company (1897-1999)
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Marconi_Electronic_Systems
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
W_&_T_Avery
British businessman and member of the House of Lords
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
George Simpson, Baron Simpson of Dunkeld
George_Simpson,_Baron_Simpson_of_Dunkeld
1897–2006 British telecommunications and engineering company
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Marconi_Company
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Marconi-Osram_Valve
British engineering company (1886–1999)
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
General_Electric_Company
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Marconi_Research_Centre
1970s 8-bit minicomputer
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
GEC_2050
British computer company, 1950–1967
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Elliott Brothers (computer company)
Elliott_Brothers_(computer_company)
high-performance RTOS for control processors Towns OS XSP OS/IV MSP MSP-EX COS DOS OS4000 Real-Time Multiprogramming Operating System GCOS Multics ChromiumOS is an
List_of_operating_systems
Class of high-speed electric locomotives
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
British_Rail_Class_91
British locomotive manufacturer, 1833–1969
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Vulcan_Foundry
RAF EW system
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Sky_Shadow_(radar_jammer)
British industrial equipment manufacturer, 1918–1966
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Ruston_&_Hornsby
British industrial manufacturer, 1918–1968
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
English_Electric
British engineering and heavy industrial company
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
British_Thomson-Houston
European defence electronics corporation
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Alenia_Marconi_Systems
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
GEC_Stephenson_locomotive
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
William_Thomas_Henley
Defunct American defense electronics contractor
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Tracor
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Hirst_Research_Centre
Files-11 ODS-1 DEC 1975 RSX-11 GEC DOS filing system extended GEC 1977 OS4000 FAT (8-bit) Microsoft (Marc McDonald) for NCR 1977 Microsoft Standalone
Comparison_of_file_systems
Deaths of British scientists, linked
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
GEC-Marconi scientist deaths conspiracy theory
GEC-Marconi_scientist_deaths_conspiracy_theory
Light bulb manufacturer
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Edison and Swan Electric Light Company
Edison_and_Swan_Electric_Light_Company
British shipbuilding company
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Vickers Shipbuilding and Engineering
Vickers_Shipbuilding_and_Engineering
Shipbuilding firm based in Glasgow, Scotland
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Yarrow_Shipbuilders
British technology company
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Telent
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Marconi_Instruments
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
GEC_Traction
Unix port derived from UNIX System III, whereas OS6000 was a port of the OS4000 operating system from the GEC 4000 series (under pressure from the marketing
GEC_Series_63
embedded active MIPS (Baget variant), KOMDIV-32, KOMDIV-64, Intel BSPs (x86) OS4000 Proprietary closed process control maintenance only GEC 4000 series OSE
Comparison of real-time operating systems
Comparison_of_real-time_operating_systems
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Birlec
British holding company
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Associated Electrical Industries
Associated_Electrical_Industries
Company during 1988 to mid 1990s
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
GEC Plessey Telecommunications
GEC_Plessey_Telecommunications
British videotex service
computers could run on several operating systems. The Prestel machines used OS4000, which was developed by GEC and supported BABBAGE, the high-level assembler
Prestel
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Radio_&_Allied_Industries
Locomotive class
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
South African Class 9E, Series 1
South_African_Class_9E,_Series_1
IBM mainframe computer
constructs in Unix also derived from the Titan command interpreter. GEC's OS4000 JCL was based on the Phoenix command interpreter. By 1973 Phoenix had a
Phoenix_(computer)
Rolling stock manufacturer
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Dick,_Kerr_&_Co.
German-born British industrialist (1863–1943)
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Hugo_Hirst,_1st_Baron_Hirst
Franco-British aerospace company (1990–2000)
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Matra_Marconi_Space
Business in London, England
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Siemens_Brothers
Class of 6 South African electric locomotives
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
South African Class 9E, Series 2
South_African_Class_9E,_Series_2
Defunct locomotive builder in North East England
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Robert Stephenson and Hawthorns
Robert_Stephenson_and_Hawthorns
Sonar systems conglomerate
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Thomson_Marconi_Sonar
Type of electric locomotive
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
South_African_Class_4E
Type of electric locomotive
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
South African Class 10E1, Series 2
South_African_Class_10E1,_Series_2
British manufacturer of electrical instruments
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Salford Electrical Instruments
Salford_Electrical_Instruments
Electric locomotive
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
South African Class 10E1, Series 1
South_African_Class_10E1,_Series_1
Telent Unify Products Computers GEC 2050 GEC 4000 series GEC Series 63 OS4000 Locomotives British Rail Class 91 GEC Stephenson locomotive South African
Peter_Hearne
travel, tourism, insurance
OS4000
OS4000
OS4000
OS4000
OS4000
OS4000
OS4000
OS4000
OS4000
travel, tourism, insurance