page_title: Application Portability Profile
section_title: APP and the NIST Enterprise Architecture Model
hierarchical_section_title: Application Portability Profile / APP topics / APP and the NIST Enterprise Architecture Model
caption_attribution_description: English: NISTs Enterprise Architecture Model
context_page_description: The Application Portability Profile is a 1990s framework for Open-System Environment designed by the NIST for use by the U.S. Government. It contains a selected suite of specifications that defines the interfaces, services, protocols, and data formats for a particular class or domain of applications.
  The Application Portability Profile offers structure to "integrate US federal, national and international, and other specifications to provide the functionality necessary to accommodate the broad range of US federal information technology requirements."
context_section_description: The "Application Portability Profile (APP) - The U.S. Government’s Open System Environment Profile Version 3.0" provides recommendations on a set of industry, Federal, national, international and other specifications that define interfaces, services, protocols, and data formats to support an Open System Environment (OSE).
  The APP addresses the lowest architecture in the NIST Enterprise Architecture Model, i.e., the Delivery System Architecture. On this level the hardware of the computer architecture, the software and the communications are being specified. Based on these specification recommendations, various services and agencies have defined detailed technical reference models.
caption: The APP addresses the lowest architecture in the NIST Enterprise Architecture Model, i.e., the Delivery System Architecture.
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