PAA
# PAA

PAA may refer to:

## Businesses and organizations

* Pacific American Airlines
* Pamoja African Alliance, a Kenyan political party
* PanAfrican Archaeological Association
* Pan African Association
* Pan American World Airways, commonly known as Pan Am
* Pan American Association of Anatomy
* Pittsburgh Athletic Association, athletic and social club
* 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, a chemical
* Phenylacetic acid, a chemical
* Phosphoamino acid analysis, a biochemistry technique
* Polyacrylamide, an acrylate polymer
* Polyacrylic acid, an acrylic polymer
* Primary Aromatic Amine, a group of compounds

### Electronic devices

* Personal Attack Alarm
* Piezo Audio Amplifier

### Linguistics

* Proto-Afroasiatic language
* Proto-Austroasiatic language

### Statistics

* Piecewise Aggregate Approximation [zh], dimension reduction method

## Legislation

* Perpetuities and Accumulations Act 1964, UK act of Parliament
* Perpetuities and Accumulations Act 2009, 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, standardized test for university admissions
