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The Platform Forum standardizes the platform infrastructure on which applications can be built. Focus is on open standards for operating systems, including the UNIX® system, POSIX®,  open source operating systems such Linux® and BSD, real-time systems and network computing. The Forum is also the specification authority for The Open Group's UNIX certification program.


What We Do
A wide spectrum of Forum participants, including commercial, government, and open source interests, are working on:

The Single UNIX Specification
Extending existing specifications, providing new interpretations of the specifications and correcting any identified errors, as well aligning the specifications with the IEEE Portable Operating System Interface (POSIX®) and ISO/IEC standards. Among other platform aspects, the specification encompasses the base operating system environment, networking services, windowing system services, internationalization aspects and programming languages.

Test Suites and Certification Programs
Updating, extending and adapting existing test suites and certification programs to include the expanding specifications and various implementations.

Current Projects

  • The Single UNIX Specification, Version 3 and 4, Interpretations and Technical Corrigenda
  • Test Suite for the Single UNIX Specification, Version 3 and 4
  • Certification Program for the Single UNIX Specification, Version 3 and 4
  • Test suites for POSIX Real-time and aspects of the Linux Standard Base
  • Additional API sets for Linux alignment and updates from other existing practise
  • The UNIX Trademark
Key Accomplishments
The Single UNIX Specification, Version 4 2013 Edition (incorporating The Base Specifications, Issue 7)
Approved as IEEE Std 1003.1, 2014 edition and ISO/IEC 9945:2008 plus TC1

The Single UNIX Specification, Version 3 2004 Edition
Approved as IEEE Std 1003.1-2001 and ISO/IEC 9945:2003, Parts 1 to 4.

Forum Notices

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Work Programs

The Forum works closely with:

  • Austin Group
  • Free Standards Group
  • IEEE Standards Association
  • IEEE Portable Application Standards Committee (PASC)
  • ISO/IEC SubCommittee 22 POSIX Advisory Group
  • Linux Standards Base
  • US Department of Defense (DoD) Defense Information Infrastructure/Common Operating Environment (DII/COE)
  • Open Group Real-time and Embedded Systems Forums

Forum membership includes system and software vendors, as well as open source interests and government organizations.

More Information

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  The Forum welcomes participation by all interested parties. If you would like to influence the direction and outcome of the Forum, have early access to specifications and participate in defining industry standards, join The Open Group.
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