.sgm

.sgm may refer to the following file formats:

• Standard Generalized Markup Language
• Encoded Archival Description Document, an XML standard for encoding archival finding aids, maintained by the Library of Congress and the Society of American Archivists
• SoftQuad XMetaL File, for the SoftQuad Software XMetaL
• Visual Boy Advance Saved State File, VisualBoyAdvance