Governmental & Military Abbreviations and Acronyms
- ARPAAutomatic Radar Plotting Aids
- ARPAAdvanced Research Projects Agency (made early internet)
- ARPAAdvanced Research Project Agency's
- ARPAAdvance Rehearsal Project Approval
- ARPAAdaptive Resource Protection Agent
- ARPAArchaeological Resource Protection Act
- ARPAArchaeological Resources Protection Act
- ARPANETAdvanced Research Projects Agency Network (early internet)
- ARPASAutomatic Radar Plotting Aids
- ARPBAirline Retiree Pass Bureau
- ARPCAir Reserve Personnel Center
- ARPCAnalysis Research Planning Consulting
- ARPCSAtmospheric Revitalization Pressure Control System
- ARPESHAccurate and Reliable Prototype Earth Sensor Head
- ARPFArmy Pulse Radiation Facility
- ARPLAdexp Format Repetitive Flight Plans Message
- ARPSAdvanced Radar Processing System
- ARPTAirport
- ARPTAdaptive Research Planning Teams
- ARPVAdvanced Remotely Piloted Vehicle
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