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More Information on the Single UNIX Specification, Version 4

Related Online Publications

The Single UNIX Specification, Version 3

The Single UNIX Specification, Version 2 (includes XCURSES)

Data Link Provider Interface (DLPI) Version 2

Transport Provider Interface (TPI) Version 2

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The Open Group is pleased, in association with the IEEE, to announce availability of the 2018 edition of the core volumes of the Single UNIX Specification on the World Wide Web. These volumes are also IEEE Std 1003.1, 2017 and ISO/IEC 9945:2009 with Technical Corrigendum 1 and 2 applied. We request that you register your details in order to proceed to view or download the complete online version of the specification. Once registered you can then bookmark the table of contents page to avoid having to register again.

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UNIX® System API tables

these tables show the standards derivation for all the interfaces in the Single UNIX Specification with respect to earlier versions of the UNIX specification, the POSIX standards and the C standard.