Definition |
Category |
| Precision Location Strike System | Military |
| Public Land Survey System | State & Local |
| Portable Life Support System | NASA |
| Position Location Sensor System | Military |
| Portable Life Support Subsystem | Unclassified |
| Portable Live Support System | Unclassified |
| Programme and Learner Support System | Unclassified |
| Parish Life in the Spirit Seminar | Religion |
| Primary Life Support System | NASA |
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