| POR | Packet Overlay Retrofit 
| Others |
| POR | Paint On Rust
| Others |
| POR | Paint Over Rust
| Others |
| POR | Partial Order Reduction
| Others |
| POR | Partial Order Relation
| Others |
| POR | Partido Obrero Revolucionario
| Others |
| POR | Partner Of Record
| Others |
| POR | Passing On Right
| Others |
| POR | Pathology and Oncology Research
| Others |
| POR | Pathology Oncology Research
| Others |
| POR | Pay Office of Record
| Others |
| POR | Pay On Return
| Others |
| POR | Payable On Receipt
| Others |
| POR | Peace Officer Recruitment
| Others |
| POR | People Of Reading
| Others |
| POR | Per Occupied Room
| Others |
| POR | Periodic Operation Report
| Others |
| POR | Peugeot Of Rust
| Others |
| POR | Philly Outer Rim
| Others |
| POR | Pilot Opinion Rating
| Others |
| POR | Pirates Online Rewritten
| Others |
| POR | Place Of Record
| Others |
| POR | Plan Of Record
| Others |
| POR | Planning Objectives Report
| Others |
| POR | Point Of Receive
| Others |
| POR | Point Of Reference
| Others |
| POR | Point of Regulation
| Others |
| POR | Point Of Resolution
| Others |
| POR | Policy Organisation and Rules
| Others |
| POR | Policy, Organization, and Rules
| Others |
| POR | Polyurethane Oil Resin
| Others |
| POR | Pools Of Radiance
| Others |
| POR | Pori, Finland
| Others |
| POR | Portsmouth Spartans
| Others |
| POR | Portuguese
| Others |
| POR | Position Of Responsibility
| Others |
| POR | Post Operative Recovery
| Others |
| POR | Power Of Relationships
| Others |
| POR | Power On Reset
| Others |
| POR | Practical Opportunistic Routing
| Others |
| POR | Preliminary Operational Requirement
| Others |
| POR | Preparation of Overseas Replacements
| Others |
| POR | Preparation of Replacements for Oversea Movement
| Others |
| POR | Press On Regardless
| Others |
| POR | Previous Orders Revoked
| Others |
| POR | Price On Request
| Others |
| POR | Process Of Reaction
| Others |
| POR | Process Of Record
| Others |
| POR | Producer Of Record
| Others |
| POR | Production Order Record
| Others |
| POR | Production Order Request
| Others |
| POR | Program Of Record
| Others |
| POR | Program Of Requirements
| Others |
| POR | Project Officers Report
| Others |
| POR | Proof Of Residence
| Others |
| POR | Proof of Residency
| Others |
| POR | Proposed Operational Requirement
| Others |
| POR | Provider of Record
| Others |
| POR | Provisioning Order Request
| Others |
| POR | Public Opinion Research
| Others |
| POR | Public Order Restoration
| Others |
| POR | Punk O Rama
| Others |
| POR | Purchase Order Request
| Others |