PNA
PNA or Pna has a variety of meanings:
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Science and Engineering
    
- abbreviation for orchid genus Paphinia
 - Pacific–North American teleconnection pattern, a climatic phenomenon
 - Parisiensia Nomina Anatomica, the revision of anatomic nomenclature
 - Peanut agglutinin, a lectin specific for Gal-β(1-3)-GalNAc
 - Peptide nucleic acid, an artificially synthesized polymer similar to DNA or RNA.
 - Plastic neutral axis, an engineering value used in plastic section modulus
 - Pottery Neolithic A, a division of the Pottery Neolithic period in archaeology
 
Organizations
    
- Pakistan National Alliance
 - Palestinian National Authority, an administrative autonomous government in parts of the West Bank and the Gaza Strip
 - Project for Nuclear Awareness, a non-profit organization that advocates for the abolition of nuclear weapons, co-founded by John C. Haas
 - Polish National Alliance, a non-profit organization, the largest Polish – American Fraternal Benefit Society in USA offering life insurance and annuities. Founded in 1880, operates solely for the benefit of its members.
 - Pa-O National Army
 - Partido Nueva Alianza, the Spanish name for the New Alliance Party (Mexico)
 - Parties to the Nauru Agreement
 - Pennsylvania NewsMedia Association
 - Philippine Nurses Association
 - Prefectura Naval Argentina, the Spanish name for the Argentine Naval Prefecture
 - National Anticorruption Directorate, Romania; formerly, National Anticorruption Prosecution Office (PNA)
 
Computing
    
- HomePNA, a home-computer networking standard
 - Personal navigation assistant (PNA)
 
Other
    
- Pacific Northern Airlines, acquired by Western Airlines in 1967
 - Pamplona Airport
 - Partial nail avulsion, a treatment of ingrown toenails
 - Philippine News Agency
 - Prenuptial agreement, a marriage contract
 
See also
    
- PNAS, Proceedings of the National Academy of Sciences of the United States of America
 - PnaS, Phosphate-Sodium Symporter, a sodium/phosphate cotransporter
 - Protected Natural Area (disambiguation)
 
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