| PBO | Packed by Owner 
| Others |
| PBO | Palm Beach Opera
| Others |
| PBO | Palos Baseball Organization
| Others |
| PBO | Paperclip Bolt and Orange
| Others |
| PBO | Paraburdoo, Western Australia, Australia
| Others |
| PBO | Parliamentary Budget Office
| Others |
| PBO | Parliamentary Budget Officer
| Others |
| PBO | Parliamentary Budget Officer (Canadian federal gov't)
| Others |
| PBO | Parliamentary Budget Officials
| Others |
| PBO | Particle Beam Optics
| Others |
| PBO | Partner Business Organization
| Others |
| PBO | Peak Back Off
| Others |
| PBO | Pension Benefit Obligation
| Others |
| PBO | People & Business OnLine
| Others |
| PBO | Performance Based Organization
| Others |
| PBO | Performance Based Oversight
| Others |
| PBO | Permanent Balloon Occlusion
| Others |
| PBO | Personal Banking Officer
| Others |
| PBO | Personal Business Objective
| Others |
| PBO | Pharmacy Benefits Optimizer
| Others |
| PBO | Phenylene Benz Obisoxazole
| Others |
| PBO | Philharmonia Baroque Orchestra
| Others |
| PBO | Philosophy Blues Original
| Others |
| PBO | Pin Bone Out
| Others |
| PBO | Pin Bones Out
| Others |
| PBO | Pine Bluff Observatory
| Others |
| PBO | Pink Bob Omb
| Others |
| PBO | Pinoy Box Office
| Others |
| PBO | Piperonyl ButOxide
| Others |
| PBO | Pixel Buffer Object
| Others |
| PBO | Pixel Buffer Objects
| Others |
| PBO | Pizza Border Oriented
| Others |
| PBO | placebo
| Others |
| PBO | Plate Boundary Observatory
| Others |
| PBO | Playback Orchestre
| Others |
| PBO | Polarized Born Oppenheimer
| Others |
| PBO | Policy Based Orchestration
| Others |
| PBO | Portland Baroque Orchestra
| Others |
| PBO | Practical Boat Owner
| Others |
| PBO | Precision Boost Overdrive
| Others |
| PBO | President Barack Obama
| Others |
| PBO | Process Before Output
| Others |
| PBO | Processing Before Output
| Others |
| PBO | Professional Business Owner
| Others |
| PBO | Profile Based Optimization
| Others |
| PBO | Profiler Batch Output
| Others |
| PBO | Profiler Binary Output
| Others |
| PBO | Profiler Binary Output (MS Source Profiler)
| Others |
| PBO | Programming by Optimisation
| Others |
| PBO | Project Based Organisations
| Others |
| PBO | Projected Benefit Obligation
| Others |
| PBO | Promo Bags Online
| Others |
| PBO | Property Book Officer
| Others |
| PBO | Public Benefit Organisation
| Others |
| PBO | Public Benefit Organization
| Others |
| PBO | Public Benefit Organizations
| Others |