The Organization for the Advancement of Structured Information Standards (OASIS) is a global non-profit organization that researches, builds and fosters the adoption of open standards in information computing. Since its 1993 launch with their flagship product, Standard Generalized Markup Language (SGML), OASIS has developed standards across a variety of technology fields.
Currently, OASIS has over 5,000 members, spread across 600 organizations and 100 countries. OASIS has developed 80 standards, as of 2012.
Formerly known as SGML Open, OASIS changed its name in 1998 to incorporate more standards and IT domains.

OASIS builds open standards geared toward reducing global costs and fostering innovation. The organization has developed open standards in multiple key technology domains, including security, cloud computing, content technology, Web services and e-government. Each standard is built with the help of OASIS members and only published if approved by a majority.
Notable OASIS standards include SGML, WS-Security, Open Document Format, Electronic Business using eXtensible Markup Language (ebXML) and Darwin Information Typing Architecture (DITA).
OASIS works with other standardization bodies, including the International Organization for Standardization (ISO), World Wide Web Consortium (W3C), American National Standards Institute (ANSI) and International Telecommunication Union (ITU) to ensure their standards are easily adopted and integrated with most technologies.