This topic collection contains sections on the system files, special files, header files, and directories that are provided with the operating system and optional program products. File formats required for certain files that are generated by the system or by an optional program are also presented in this topic collection.
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The AIX® operating system is designed to support The Open Group's Single UNIX Specification Version 3 (UNIX 03) for portability of operating systems based on the UNIX operating system. Many new interfaces, and some current ones, have been added or enhanced to meet this specification. To determine the correct way to develop a UNIX 03 portable application, see The Open Group's UNIX 03 specification on The UNIX System website (http://www.unix.org).