English abbreviations from oip to oji
- OIP (Open Internet Platform)
- OIPE (Office of Institutional Planning and Effectiveness (Western Carolina University))
- OIQ (Olympia Institute Quarterly)
- OIR (Okushiri Airport)
- OIRA (Office of Information and Regulatory Affairs)
- OIRT (Organisation International de Radio et Télévision)
- OIS (Obstacle identification surface)
- OISC (One Instruction Set Computer)
- OISE (Ontario Institute for Studies in Education (University of Toronto))
- OISS (Office for International Students and Scholars)
- OIT (Oita Airport)
- OITD (Office of International Training and Development (Clark Atlanta University))
- OIU (Operator Interface Unit)
- OIV (Organizzazione Internazionale della Vigna e del Vino (International Organisation of Vine and Wine))
- OIW (Our Indian Wards (by George W. Manypenny, published in 1880))
- OIZ (Bizerte-Sidi Ahmed Air Base)
- oj (Anishinaabe language (Ojibwa) (ISO 639-1 code))
- OJA (Orlando Junior Academy)
- OJB (ObJectRelational Bridge)
- OJC (Johnson County Executive Airport)
- OJCS (Office of Joint Chiefs of Staff)
- OJE (Open Java Extensions)
- OJF (Operation Joint Forge, Bosnia)
- oji (Anishinaabe language (Ojibwa) (ISO 639-2 code))