PAA may refer to:

Businesses and organizations

Pacific American Airlines Pacific American Airlines was a United States charter airline headquartered in Burbank, California. Its predecessor was formed in 1946 as Airplane Charter by Mercer and renamed to Mercer Airlines in 1955. DeWight W. Mercer sold the company, was ...

PanAfrican Archaeological Association The PanAfrican Archaeological Association (PAA) is a pan-African professional organisation for archaeologists, geologists and palaeoanthropologists. History The association was founded by Louis Leakey and its first congress was held in Nairo ...

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

* Pan American World Airways, commonly known as Pan Am *

Pan American Association of Anatomy The Pan American Association of Anatomy (PAA) is a public, nonprofit, scientific organization that brings together professionals engaged in the study of Anatomy and related sciences in the American continent. Origins and objectives The Pan American ...

* Pittsburgh Athletic Association, athletic and social club *

Polish American Association The Polish American Association (PAA) (Polish: ''Zrzeszenie Amerykańsko Polskie'') is a non-profit human services agency that serves the diverse needs of the Chicago Polish immigrant community. Originally located in Polish Downtown, the PAA was ...

* Population Association of America, dedicated to population and demography studies *

Portland Adventist Academy Portland Adventist Academy (PAA) is a private high school located in Portland, Oregon, United States operated by the Seventh-day Adventist Church. It is a part of the Seventh-day Adventist education system, the world's second largest Christian ...

, an Adventist High School

Science, technology and mathematics

Chemistry and materials science

* Peroxyacetic acid, a chemical *

Phenylacetic acid Phenylacetic acid (PAA; 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. Endogen ...

, a chemical *

Phosphoamino acid analysis Phosphoamino acid analysis, or PAA, is an experimental technique used in molecular biology to determine which amino acid or acids are phosphorylated in a protein. Technique A protein is first phosphorylated using 32P-labeled ATP, usually via an ''i ...

, a biochemistry technique * Polyacrylamide, 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 deproto ...

, an acrylic polymer *

Primary Aromatic Amine In organic chemistry, an aromatic amine is an organic compound consisting of an aromatic ring attached to an amine. It is a broad class of compounds that encompasses anilines, but also many more complex aromatic rings and many amine substituents ...

, a group of compounds

Electronic devices

* Personal Attack Alarm *

Piezo Audio Amplifier An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the magnitude of a Signal (information theory), signal (a time-varying voltage or Electric current, current). It may increase the power (physics ...

Linguistics

* Proto-Afroasiatic language *

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

Political parties

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 Kenya Kwanza and joined the Azimio La Umoja alliance. It contested the August 2022 general election and won 4 seats ...

Legislation

* Perpetuities and Accumulations Act 1964, UK act of Parliament * Perpetuities and Accumulations Act 2009, UK act of Parliament *

Protect America Act of 2007 The Protect America Act of 2007 (PAA), (, enacted by ), is a controversial amendment to the Foreign Intelligence Surveillance Act (FISA) that was signed into law by U.S. President George W. Bush on August 5, 2007. It removed the warrant requi ...

, amendment to the US Foreign Intelligence Surveillance Act

Other uses

Penny Arcade Adventures ''Penny Arcade Adventures: On the Rain-Slick Precipice of Darkness'' is an episodic action-adventure role-playing video game series based on the webcomic ''Penny Arcade''. Episode 1 was released on May 21, 2008 on Linux, Mac OS X, Windows, and X ...

, 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 Colleg ...

, standardized test for university admissions