The Full Form of IPMS is‍ Institution of Professionals, Managers and Specialists.

The Institution of Professionals, Managers and Specialists (IPMS) was a trade union representing managers and other people with professional qualifications in the United Kingdom, with a majority of members working in the civil service.

The union was founded in 1919 as the Institution of Professional Civil Servants (IPCS), bringing together seventeen associations based in individual departments of the civil service. The spur for its formation was the creation of the Whitley Council system, on which the new union qualified for two seats. Membership grew rapidly, from 1,534 on formation, to 2,917 the following year, reaching 99,000 by 1980.

The union initially operated only as a loose confederation, but in 1946 it established its own National Executive Committee and headquarters, and in 1951, the remaining constituents became branches of the union. At this point, it had strong representation in the Post Office, and it worked as part of the Council of Post Office Unions from 1969 until 1977

The union absorbed the Society of Technical Civil Servants in 1969. In 1976, after many attempts to get its members to agree, it joined the Trades Union Congress. In 1984, the Association of Government Supervisors and Radio Operators (AGSRO) joined IPCS.

Following privatisation of the jobs of many of its members, IPCS changed its name to the Institution of Professionals, Managers and Specialists, in 1989. In 2001, it merged with the Engineers’ and Managers’ Association to form Prospect.