Tech moves fast! Stay ahead of the curve with Techopedia!
Join nearly 200,000 subscribers who receive actionable tech insights from Techopedia.
Single Unix Specification is a family of standards required to be followed by the OS to qualify for the name UNIX. It is developed and maintained by the Austin group, based on earlier work by Open group and IEEE. It was created in the mid 1980s to standardize OS interfaces for variants of the UNIX OS.
The single Unix specification ensures that program developed in one unix system would run in somewhat different (different flavor) Unix OS.
Initially, the UNIX OS had four elements; the specification, the technology, the registered trade mark (e.g. UNIX) and the product (e.g. UNIXWare). With the advent of the Single UNIX specification, there arose a single open consensus specification to define the product. The specification and the trade mark are managed and held in trust for the industry by the X/Open Company.
The official marks for conforming systems are UNIX 98, UNIX 05, UNIX 93 and UNIX 95. The user and software interfaces to the OS are specified in four sections:
The registered UNIX like systems include such systems as: