The Austin Common Standards Revision Group

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Latest News About the Group

October 14 2015: The second committee draft of TC2 for 2008 is available for review (select login). This review also includes a full merged draft of the standard.

April 17 2015: The first committee draft of TC2 for 2008 is available for review

April 19 2013: The 2013 edition of the full specification has been published.

February 6 2013:IEEE approves TC1 for 2008

Meeting minutes are available in the document register.

View the Approvals status Summary.

Next Meeting

The technical committee meets frequently (once every two weeks). These meetings are held by teleconference and use an etherpad. See the events diary for the next meeting.

Next Teleconference Agenda

The next teleconference is scheduled to discuss inbound defect reports including considerations for new interpretations. (See the events diary for the regular bridge number and timeslot, there is a toll free number for US participants)

Mail Archives

Browse : [Gmane archive ]

Defect Reports/Bug Reporting

To submit a bug report against the specifications please use the Mantis online defect tracker at

Join the Review Group

We recently completed the first technical corrigendum to the 2008 standard and are working on maintenance towards the second technical corrigendum. To actively work on the Austin Group documents you need to join the austin-group mailing list. See the mailing list page for more information.

Certified Products

See the UNIX® certified products list.

See the POSIX®: Certified by IEEE and The Open Group certified products list.

Group Materials

Group materials are kept in the document register.

only search the Open Group site
The group also maintains a set of links to other related standards materials.

Future Plans

We're currently in maintenance mode, working towards the second technical corrigendum of the 2008 revision. We also tag some changes for Issue 8. We meet regularly at least bi-weekly by teleconference. There is a freephone number to join the teleconference. You need to join the mailing list to get a login id.

The Austin Common Standards Revision Group (CSRG) is a joint technical working group established to develop and maintain the core open systems interfaces that are the POSIX® 1003.1 (and former 1003.2) standards, ISO/IEC 9945 parts 1 to 4, and the core of the Single UNIX Specification.

The approach to specification development is "write once, adopt everywhere", with the deliverables being a set of specifications that carry the IEEE POSIX designation, The Open Group's Technical Standard designation, and the ISO/IEC designation. The current set of specifications is simultaneously ISO/IEC 9945, IEEE Std 1003.1 and forms the core of the Single UNIX Specification.

This unique development combines industry led efforts and the formal standardization activities into a single initiative, and includes a wide spectrum of participants. The group is free and open to participate in and features a balanced set of interest groups including commercial companies, influential figures from the open source community, liaisons from other standards groups, educational and government users, and user groups.

Working with the Open Source community

The group includes developers from the Open Source community. As part of acknowledging their valuable input the copyright holders have made several grants relating to use of the documentation in those projects. Some of these are listed: the Linux Man Pages project, the FreeBSD project, the NetBSD operating system, the Cygwin Project, Gunnar Ritter's Heirloom Toolkit and other tools, Joerg Schilling's pax and find, Jens Schweikardt book, and the ISPRAS Linux testing project.

Obtaining a Copy of the Standard

The html version of the 2013 edition is freely available on the web, more information and registration are here.

A PDF copy of the full specification is also available at the same location or from IEEE.

(more information...)

How to get Involved

Why you should get involved with POSIX?

Read a backgrounder on the scope, audience and purpose for this standard.

View a set of slides (pdf) or read the long scope for the 2008 revision for an overview.

Read the Frequently Asked Questions file.

The group is chaired by Andrew Josey from The Open Group. The Open Group manages the day to day running of the group providing the chair, the editor and email/web facilities.

Committee Draft Development Procedures

A set of Committee Maintenance Procedures for the Approved Standard are available for information (summary diagram).

The group uses a Mantis bug tracker for handling change requests, defect reports and interpretations. This is available at

Joint Working Group Procedures

JDOCS Procedures for Operation of the group are available.

Invitation To Participate
Anyone wishing to participate in the Austin Group should contact the chair with their requests. There are no fees for participation or membership. You may participate as an observer or as a contributor. You do not have to attend face-to-face meetings to participate, electronic participation is most welcome. Please subscribe to our Mailing list.

POSIX is a registered trademark of the IEEE.
UNIX is a registered trademark of The Open Group.
Acknowledgements: Thanks to AC for the html page layout.