Hypertext Markup Language. HTML is the main document markup language for the World Wide Web.
Multipurpose Internet Mail Extensions. MIME allows the transmission of non-ASCII data, and mixed content data, in electronic mail messages.
Message Handler. MH is a free message handling system initially developed by the RAND Corporation, with subsequent development done at the University of Califonia: Irvine.
Practical Extraction and Report Language. Perl is an interpreted programming language suited for processing text and generating reports.
Standard Generalized Markup Language. SGML is a language for document representation.