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|Full name||Technical, Administrative and Supervisory Section|
|Founded||21 May 1913|
|Merged into||Manufacturing Science and Finance|
TASS News and Journal
|Head union||Amalgamated Union of Engineering Workers (1970–1985)|
|Affiliation||TUC, CSEU, IMF, LMTU, Labour|
|Office location||Onslow Hall, Richmond upon Thames|
The union was founded in 1913 by 200 draughtsmen, as the Association of Engineering and Shipbuilding Draughtsmen (AESD). It expanded rapidly, and had more than 14,000 member by the end of the decade. Although it declined during the Great Depression, it retained most of its members by offering unemployment benefit, and by 1939 established a new high of 23,000 members, this rising to 44,000 by the end of World War II and over 75,000 by 1968. From 1960, it accepted technicians in ancillary roles, changing its name to the Draughtsmen's and Allied Technicians' Association (DATA).
In 1970, DATA amalgamated with the Amalgamated Union of Engineering and Foundry Workers (AUEFW) and Constructional Engineering Union (CEU) to form the Amalgamated Union of Engineering Workers (AUEW). The former members of DATA formed the Technical and Supervisory Section of the new union. At the 1973 Representative Council Conference it was agreed to rename it the Technical, Administrative and Supervisory Section (TASS).
In 1985, after considerable problems within the AUEW, TASS broke away to become an independent union.
TASS absorbed the National Union of Gold, Silver and Allied Trades (NUGSAT) in 1981, the National Union of Sheet Metal Workers, Coppersmiths, Heating and Domestic Engineers in 1983, the Association of Patternmakers and Allied Craftsmen in 1984, the Tobacco Workers' Union in 1986, and the National Society of Metal Mechanics in 1987.
In 1988, it merged with the Association of Scientific, Technical and Managerial Staffs (ASTMS) to become the Manufacturing Science and Finance Union (MSF). MSF in turn merged with the AEEU to form Amicus in 2002. This resulted in TASS and the former AUEW (by then part of the AEEU) being re-united within one union.
The union sponsored Labour Party candidates in each Parliamentary election from 1950 onwards.
- 1913: L. Blair
- 1918: Peter Doig
- 1945: James Young
- 1952: George Doughty
- 1974: Ken Gill
Assistant General Secretaries
- 1919: David Manteklow
- 1920: David Manteklow and James Young
- 1929: Post vacant
- 1946: John Holland
- 1956: J. Dickinson
Deputy General Secretaries
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- Mortimer, J. E. (1960). A History of the Association of Engineering and Shipbuilding Draughtsmen. London: Macgibbon and Kee.