| Abbreviation | Definition |
|---|---|
| PAX | Passengers |
| PAX | Programming, Administration and Execution (System) |
| PAX | Public Affairs Plans |
| PB | Particle Beam |
| PB | Patriot's Baby |
| PB | Peace Building |
| PB | President's Budget |
| PB | Property Book |
| PB | Push Button |
| PB4T | Planning Board For Training |
| PBA | Performance-Based Agreement |
| PBA | Pine Bluff Arsenal |
| PBA | Production Base Analysis |
| PBAC | Program Budget Advisory Committee |
| PBAOE | Point Blank Area Of Effect |
| PBBE | Planning, Programming, Budgeting and Execution System |
| PBC | Pentagon Building Circular |
| PBCR | Portable Bar Code Recorder |
| PBD | Process Building Distance |
| PBD | Product Baseline Description |