The Association of Professional, Executive, Clerical and Computer Staff was a British Trade Union which was formed in 1890 as the Clerk's Union and later was renamed as The National Union of Clerks. Then, following rapid growth and amalgamation with several other unions, the name was again changed to The National Union of Clerks and Administrative Workers (NUCAW) with a membership of around 40,000.

Then in 1940 the Association of Women Clerks and Secretaries transferred to NUCAW and the union was renamed : The Clerical and Administrative Workers Union and finally became the Association of Professional, Executive, Clerical and Computer Staff (APEX) in 1972. It was the union at the centre of the Grunwick dispute.

In 1989 the union joined the GMB trade union and now exists as a section of the GMB. The GMB is a general trade union in the United Kingdom, and has more than 700,000 members. ...

References

• GMB webpage on its history and that of its precursor unions