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)
