Informatics A versatile, non-proprietary open operating system, which is the industry standard for mainframes, work stations and servers on the Internet, written in C programming language. See OS X. Cf MacOS, Windows.
The Single UNIX Specification brand program has achieved critical mass: vendors whose products have met the demanding criteria for and have been awarded the UNIX 95 brand now account for the majority of UNIX systems by value," said Brown.
The common 64-bit definition for UNIX application environments builds on X/Open's Single UNIX Specification (previously known as SPEC1170) by removing data size dependencies in the application programming interfaces (APIs).
The X/Open brand for UNIX 95 is awarded to products that conform to X/Open Company's Single UNIX Specification, the most comprehensive standard-based operating system specification available in the industry," said Mike Lambert, vice president and chief technical officer of X/Open Company Limited.