English abbreviations from osi to osp
- OSI (Open Source Initiative)
- OSIA ((U.S.) On-Site Inspection Agency)
- OSII (Operating System Interface Infrastructure)
- OSIM (Open Society Institute Montenegro)
- OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System (astronomical system on the Rosetta spacecraft))
- OSIRM (OSI Reference Model)
- OSIS (Open Source Information System)
- OS-JTF (Open Systems _ Joint Task Force)
- OSK (Oskarshamn Airport)
- OSL (Open Source License||Optically Stimulated Luminescence||Orbiting Solar Laboratory)
- OSLA (Oklahoma Student Loan Authority)
- OSM (One Saturday Morning)
- O.S.M. (Ordo Servorum Mariae (Servites))
- OSMA (On-Site Maintenance Agreement)
- OSN (Orion Syndicate Network)
- OSNS (Open Systems Network Support)
- OSOSS (Open Standards and Open Source Software)
- OSOTPBOIAS (One Sec, On The Phone, Be Off In A Sec)
- OSP (Off Street Parking)
