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JACS coding and principles
UCAS subject classifications employ the Joint Academic Coding System (JACS). This system was introduced for 2002 entry, and replaced UCAS Standard Classification of Academic Subjects (SCAS).
The JACS system is used by the Higher Education Statistics Agency (HESA), and is the result of a joint UCAS-HESA subject code harmonisation project.
JACS is also used by UK institutions to identify the subject matter of programmes and modules. These institutions include the Department for Innovation, Universities and Skills (DIUS), the Home Office and the Higher Education Funding Council for England (HEFCE).