(Government Open Systems Interconnection Profile) A U.S. government mandate that after August 15, 1990, all new network procurements must comply with OSI. Testing is performed at the NIST, which maintains a database of OSI-compliant commercial products. GOSIP also allows TCP/IP protocols to be used.

Since broad adoption of OSI standards never came to fruition, GOSIP evolved into POSIT (Profiles for Open Systems Internetworking Technologies), which is a set of non-mandatory standards that acknowledge the widespread use of TCP/IP.