Open-system environment reference model: Difference between revisions

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== History ==
The development of the open-system environment reference model started early 1990s by the [[NIST]] as refinement of the [[POSIX]] (Portable Operating System Interface) standard. POSIX is a standard for maintaining compatibility between operating systems, and addresses interoperation for communications, computing, and entertainment infrastructure. It'sIts developeddevelopment started late 1980s by the POSIX Working Group 1003.0 of the [[Institute of Electrical and Electronics Engineers]] (IEEE).<ref name="Hun95"/>
 
The NIST hosted workshops and conducts other support activities to assist users in addressing open systems requirements, preparing for the use of new technology, and identifying the international, national, industry and other open specifications that are available for building open systems frameworks, such as the government's applications portability profile for the open-system environment.
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The [[Application Portability Profile]] (APP) is an OSE profile designed for use by the U.S. Government. It covers a broad range of application software domains of interest to many Federal agencies, but it does not include every ___domain within the U.S. Government’s application inventory. The individual standards and specifications in the APP define data formats, interfaces, protocols, or a mix of these elements.
 
The services defined in the APP tend to fall into broad service areas . These service areas are:<ref name="Hun95"/>
* Operating system services (OS)
* Human/computer interface services (HCI)