English abbreviations from obh to obra
- OBH (Oregon BushHackers)
- OBI (Only By Invitation)
- OBIC (Optical Beam Induced Current)
- OB. IN XTO. (Obiit In Christo ("Died In Christ"))
- OBIR (Operation Blessing International Relief)
- OBIRDC (Operation Blessing International Relief and Development Corporation)
- OBIT (OBITuary)
- OBJ (Objective (military parlance))
- OBK (Out Back Kayak)
- OBL (Zoersel-Oostmalle Airfield)
- OBM (Oil-Based Mud)
- OBN (Old Boys Network)
- OBO (Tokachi-Obihiro Airport)
- OBP (on-base percentage)
- OBQ (Open Bloody Questions)
- OBR (Optical Beam-Riding)
- OBRA (Omnibus Budget Reconciliation Act)