OAI may refer to:

Object–action interface Office of American Innovation Omni Air International, a charter airline Open Archives Initiative, standards body Open Archives Initiative Protocol for Metadata Harvesting Open Archives Initiative Object Reuse and Exchange OAI, the IATA code of Bagram Airfield, Afghanistan OR-AND-invert, a logic gate made up of OR gates followed by a NAND gate Shorthand for OpenAI, an AI company

See also Oai (disambiguation)