| Acronym | Definition |
|---|
| PNA | Palestinian National Authority |
| PNA | Phoneline Networking Alliance |
| PNA | Peptide Nucleic Acid |
| PNA | Pneumonia |
| PNA | Personal Navigation Assistant |
| PNA | Pituitary Network Association |
| PNA | Pacific/North American |
| PNA | Polish National Alliance (established 1880 in Chicago, Illinois) |
| PNA | Prefectura Naval Argentina (Argentina Coast Guard) |
| PNA | Personal Needs Allowance |
| PNA | Prevention Needs Assessment |
| PNA | Polynuclear Aromatics |
| PNA | Professional National Accountant |
| PNA | Parque Natural da Arrábida (Portugal) |
| PNA | Pennsylvania Nurses Association |
| PNA | Performance Network Analyzer (Agilent Technologies, Inc.) |
| PNA | Pamplona, Spain - Pamplona - Noain (Airport Code) |
| PNA | Principles of Naval Architecture (Society of Naval Architects & Marine Engineers reference) |
| PNA | Progressive Neuronal Abiotrophy (nerve disorder in dogs) |
| PNA | Philippine Nurses Association Inc. |
| PNA | Partial Nail Avulsion (ingrown toenail treatment) |
| PNA | Plan National d'Allocation (French: National Allocation Plan; Kyoto Protocol) |
| PNA | Pacto de No Agresión (Spanish) |
| PNA | Passed but Not Advanced |
| PNA | Pages Needing Attention (Wikipedia) |
| PNA | Peptide Nucleic Acid Oligomer (biochemistry) |
| PNA | Paraffins, Naphthenes, and Aromatics |
| PNA | Planul National de Actiune (Romania) |
| PNA | Pensamiento Numérico y Algebráico (Spanish) |
| PNA | Private Non-Custodial Agency (children's services) |
| PNA | Phase Noise Analysis |
| PNA | Planned Not Authorized |
| PNA | Principal Naval Architect |
| PNA | Phone Number Administration |
| PNA | Parchetul Naþional Anticorupþie (Romania) |
| PNA | Partial Net Area (United States Coast Guard) |
| PNA | Post Nasal Aspirate |
| PNA | Public News Article |
| PNA | Persistent Nerve Agent |
| PNA | Principle of Non-Aggression |
| PNA | Pre-Negotiation Agreement (contract) |
| PNA | Parties to the Nauru Agreement (fishing industry; various nations) |
| PNA | Psychiatric Nursing Association of Ireland (UK) |