* Official UMLS site* UMLS Summary description, with links to factsheets and documentation for Metathesaurus, Semantic Network, SPECIALIST Lexicon and MetamorphoSys* UMLS Overview and Tutorial, by Rachel Kleinsorge, Jan Willis, Allen Browne, Alan Aronson* A Perl module to query a UMLS mysql installation
==External links==* Official UMLS site* UMLS Summary description, with links to factsheets and documentation for Metathesaurus, Semantic Network, SPECIALIST Lexicon and MetamorphoSys* UMLS Overview and Tutorial, by Rachel Kleinsorge, Jan Willis, Allen Browne, Alan Aronson* A Perl module to query a UMLS mysql installation