In late 1973, some members of staff in the Overseas Aid Department (later the Overseas Division) were brought together to form the 'Think Tank' (sometimes referred to as the 'Carpet Centre' because the office in Summertown, Oxford, was located above a carpet store) to consider technical and other matters and to support the work of the Department. By 1978, members of this group had formed a team calling itself the Technical Unit. By 1984, a Health Unit and an Emergencies Unit having also been created, Oxfam had formally established the Technical Unit as a specialist advisory unit in the Overseas Division. In 1993, the Health and Technical Units were replaced by the Public Health Team, which became part of the Emergencies (later Humanitarian) Department.