The Technical, Administrative and Supervisory Section (TASS) was a British trade union.

At the 1973 Representative Council Conference it was agreed to rename it the Technical, Administrative and Supervisory Section (TASS).

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).

The union sponsored Labour Party candidates in each Parliamentary election from 1950 onwards.