The Austin Common Standards Revision Group (also known as the Austin Group) is a technical working group, which looks after the development and maintenance of a common standard POSIX.1 and part of the Single Unix Specification.
The operation is called a " write once, use everywhere" by the group itself defines the standards and results of the Group are therefore often valid. So they appear to one as standards of ISO and IEC, as well as the IEEE and technical papers of the Open Group itself, this approach is the development of industry and standardization organizations unite in a single group in order to achieve better efficiency.
The group currently has over 500 members, is chaired by Andrew Josey of the Open Group. The Open Group operates the daily business of the Group, including e-mail and web server. There are no membership fees or other contributions to be paid.