PAA may refer to:

Businesses and organizations

Pamoja African Alliance The Pamoja African Alliance (PAA) is a political party in Kenya. It is led by Amason Kingi. History In May 2022, the party left the Azimio La Umoja alliance and joined the Kenya Kwanza coalition. It presented contestants in the August 2022 gen ...

, a Kenyan political party * PanAfrican Archaeological Association *

Pan African Association The African Association, known as the Pan-African Association after 1900, was an organization formed by leaders of Black people, African descent to "promote and protect the interests of all subjects claiming African descent, wholly or in part, ...

Pan American World Airways Pan American World Airways, originally founded as Pan American Airways and more commonly known as Pan Am, was an airline that was the principal and largest international air carrier and unofficial overseas flag carrier of the United States for ...

, commonly known as Pan Am * Pan American Association of Anatomy *

Patriot Alliance Association The (Chinese) Patriot Alliance Association (Chinese: 愛國同心會), abbreviated PAA, also known as the Concentric Patriotism Alliance (Chinese: 中華愛國同心會) or the Concentric Patriotism Association of China is a pro-Chinese Communis ...

, a radical Chinese nationalist party in Taiwan * Pickleball Australia Association, Australia's national governing body for pickleball * Pickleball Association of Australia, former name of Pickleball Association of Queensland * Polish American Association * Population Association of America, dedicated to population and demography studies * Portland Adventist Academy, an Adventist High School

Science, technology and mathematics

Chemistry and materials science

Peroxyacetic acid Peracetic acid (also known as peroxyacetic acid, or Percidine) is an organic compound with the formula CH3CO3H. This peroxy acid is a colorless liquid with a characteristic acrid odor reminiscent of acetic acid. It can be highly corrosive. Perac ...

, a chemical * Pharmacologic Ascorbic Acid, a medical treatment *

Phenylacetic acid Phenylacetic acid (conjugate base phenylacetate), also known by various synonyms, is an organic compound containing a phenyl functional group and a carboxylic acid functional group. It is a white solid with a strong honey-like odor. Endogenously ...

, a chemical * Phosphoamino acid analysis, a biochemistry technique *

Polyacrylamide Polyacrylamide (abbreviated as PAM or pAAM) is a polymer with the formula (-CH2CHCONH2-). It has a linear-chain structure. PAM is highly water-absorbent, forming a soft gel when hydrated. In 2008, an estimated 750,000,000 kg were produced, ...

, an acrylate polymer *

Polyacrylic acid Poly(acrylic acid) (PAA; trade name Carbomer) is a polymer with the formula (CH2−CHCO2H)''n''. It is a derivative of acrylic acid (CH2=CHCO2H). In addition to the homopolymers, a variety of copolymers and crosslinked polymers, and partially ...

, an acrylic polymer * Primary Aromatic Amine, a group of compounds

Electronic devices

* Personal Attack Alarm * Piezo Audio Amplifier

Linguistics

Proto-Afroasiatic language Proto-Afroasiatic (PAA), also known as Proto-Hamito-Semitic, Proto-Semito-Hamitic, and Proto-Afrasian, is the reconstructed proto-language from which all modern Afroasiatic languages are descended. Though estimations vary widely, it is believed ...

Proto-Austroasiatic language Proto-Austroasiatic is the reconstructed ancestor of the Austroasiatic languages. Proto-Mon–Khmer (i.e., all Austroasiatic branches except for Munda) has been reconstructed in Harry L. Shorto's ''Mon–Khmer Comparative Dictionary'', while a ...

Statistics

* , dimension reduction method

Legislation

Perpetuities and Accumulations Act 1964 The Perpetuities and Accumulations Act 1964 (c. 55) is an act of the Parliament of the United Kingdom. In English land law it reformed the rule against perpetuities The rule against perpetuities is a legal rule in common law that prevents pe ...

, UK act of Parliament *

Perpetuities and Accumulations Act 2009 The Perpetuities and Accumulations Act 2009 (c. 18) is an Act of the Parliament of the United Kingdom that reforms the rule against perpetuities. The Act resulted from a Law Commission report published in 1998. It abolishes the rule against p ...

, UK act of Parliament * Protect America Act of 2007, amendment to the US Foreign Intelligence Surveillance Act

Other uses

* Penny Arcade Adventures, video game series *

Prueba de Aptitud Académica The PAA or Prueba de Aptitud Académica is an educational assessment that is used to help universities across Latin America select incoming students. More specifically, it is a standardized test for university admissions. It is offered by College ...

, standardized test for university admissions