2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53350It is argued that chiral algebras of conformal field theory possess a W-algebra structure. A survey of explicitly known W-algebras and their constructions is given. (Talk given at the XIX International Colloquium on ``Group Theoretical Methods in Physics'', Salamanca, Spain, June 29 -- July 4, 1992)5 pages LaTeX, Imperial/TH/91-92/38High Energy Physics - Theorytext