Pa

Pa, pa, PA, P.A. or pA may refer to:

Businesses and organisations

Palestinian National Authority, also called Palestinian Authority, interim governing body of the Gaza Strip and part of the West Bank
Pakistan Army
People's Association (Singapore), a Singaporean grassroots statutory board
Philippine Army
Patrulla Águila
Planning Authority, a government agency of Malta

Progressive Alliance, a political international of social-democratic, socialist and progressive political parties and organisations
Professional association, a type of business organization
PA Consulting Group
PA Media, a news agency in the UK and Ireland, formerly the Press Association
Produttori Associati, an Italian record label

Parliamentary assistant (UK politics)
Personal assistant
Physician assistant or physician associate
Production assistant, a title in the film industry
Project architect
Prosecuting attorney, title of prosecutors in some US state courts and smaller jurisdictions
Protonotary Apostolic, the highest ranking non-episcopal honorific title for Roman Catholic clergy
Public Accountant, a professional qualification in the US

.pa, top-level domain for Panama
ALCO PA, a railroad locomotive
Parental alienation, in psychology
Pascal (unit), the SI unit of pressure
Peano axioms, a set of axioms for the natural numbers
Peptide amphiphile, a type of self-assembling peptide
Picoamp (pA), one trillionth of an ampere
Polyacrylamide, a gel-forming polymer
Polyamide, a family of synthetic materials used in fabrics
Predictive analytics, analyzes current and historical facts to make predictions about future or otherwise unknown events
Protactinium, symbol Pa, a chemical element
Provider-aggregatable address space, a system of allocation of internet addresses
Public address system (PA system or simply PA), for making public announcements
Pernicious anemia, anemia that results from lack of intrinsic factor
Primary aldosteronism, excess production of the hormone aldosterone from the adrenal glands

Phillips Academy Andover, a private secondary school in Massachusetts, United States, often referred to as Phillips Andover or PA
Portsmouth Abbey School, a private secondary school in Rhode Island, United States
Pulaski Academy, a private school in Little Rock, Arkansas, United States

PA, a series of paper sizes
Pā, a type of fortified Māori village
P.A. (group), a southern hip hop trio in Atlanta, Georgia, United States
Penny Arcade, a video game webcomic
Performance appraisal, for evaluating an employee's job performance
Plate appearance, a statistic in baseball
Prince Albert (genital piercing), a form of male genital piercing
Public bill, also known as a Public Act, in law
Planetary Annihilation, video game, or its successor Planetary Annihilation: Titans