Single UNIX Specification

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Single UNIX Specification

A standard Unix programming interface from The Open Group, which governs compliance. Formerly known as Spec 1170, and containing more than 1,100 API calls, products branded with the UNIX 95, UNIX 98 and UNIX 03 logos conform to Versions 1, 2 and 3 of the specification respectively. UNIX is a registered trademark of The Open Group and spelled with upper case letters. See Unix like and Unix.

UNIX 98 is the branding for Version 2 of the specification. It adds support for real-time processing, threads, Y2K compliance and architecture neutrality. About half of the original APIs were derived from X/Open's XPG4 operating system. Also included are the X/Open Transport Interface (XTI), X and Motif interfaces, Unix sockets and curses. See UNIX 95 and UNIX 98.

UNIX 03 is the branding for Version 3 of the specification. Introduced in late 2002, it makes the POSIX interface a mandatory requirement for certification (see POSIX). See UNIX 03 and Open Group.
References in periodicals archive ?
For more information on version 3 of the Single UNIX Specification, visit http://www.
The latest version of the Single UNIX Specification incorporates standards for threads, which ISVs have been seeking for some time; realtime, which is a key requirement of the federal government; a clean-up of multiple bit processing, which emerged from the Aspen Project; and some Year 2000 issues.
X/Open congratulates the working group on achieving the objectives of extending the Single UNIX Specification to 64-bit platforms and agreeing on a common data model.
Delivery of a version of Windows NT that is guaranteed, by use of the X/Open brand, to conform to the Single UNIX Specification will, for the first time, allow NT access to contracts that require UNIX systems.
As a leader in open-systems standards, we look forward to working with X/Open to create industrywide acceptance of the Single UNIX Specification to help unify the market and accelerate the continued growth of UNIX systems.
The Single UNIX Specification -- A panel discussion presented by X/Open Company, Ltd.

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