PSH
Polythematic structured-subject heading system (abbreviated as PSH from the Czech Polytematický Strukturovaný Heslá?) is a bilingual Czech–English controlled vocabulary of subject headings developed and maintained by the National Technical Library (the former State Technical Library) in Prague. It was designed for describing and searching information resources according to their subject. PSH contains more than 13,900 terms, which cover the main fields of human knowledge (source)
