Historical
IEEE Std 1003.1-2004
IEEE Standard for Information Technology-Portable Operating System Interface (POSIX®)-Base Definitions (Volume 1), System Interfaces (Volume 2), Shell and Utilities (Volume 3), and Rationale (Volume 4)
This standard is simultaneously ISO/IEC 9945, IEEE Std 1003.1, and forms the core of the Single Unix Specification, Version 3. This 2004 edition includes IEEE Std 1003.1-2001/Cor 1-2002 and IEEE Std 1003.1-2001/Cor 2-2004 incorporated into IEEE Std 1003.1-2001 (the base document). The two Corrigenda address problems discovered since the approval of IEEE Std 1003.1-2001. These changes are mainly due to resolving integration issues raised by the merger of the base documents that were incorporated into the IEEE Std 1003.1-2001, which is the single common revision to IEEE Std 1003.1-1996, IEEE Std 1003.2-1992, ISO/IEC 9945-1:1996, ISO/IEC 9945-2:1993, and the Base Specifications of The Open Group Single UNIX® Specification, Version 2.
Institute of Electrical and Electronics Engineers [ieee]