English abbreviations from obl to obu
- 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)
- OBS (Omnibearing selector)
- OBSAI (Open Base Station Architecture Initiative)
- OBSB (Oahu Base Support Battalion)
- OBSS (Off Board Sensor Systems||Ordo Byantinus Sancti Sepulchri (Byzantine Order of the Holy Sepulchre)||Orbiter Boom Sensor System (space shuttle)||Origins Billion Star Survey)
- OBST (Obstacle)
- OBSTINTEL (Obstacle Intelligence)
- OBT (Oakland/coliseum Stat Airport)
- OBU (Kobuk Airport)
