APA may refer to:
Apartheid (ZA pronunciation: /əˈpɑːrteɪd/; Afrikaans: [ɐˈpɐrtɦəit]) was a system of institutionalised racial segregation and discrimination in South Africa between 1948 and 1991, when it was abolished.
An apartment (in American and Canadian English) or a flat (in British English) is a self-contained housing unit (a type of residential real estate) that occupies only part of a building, correctly, on a single level without a stair.
Apache Hadoop (pronunciation: /həˈduːp/) is an open-source software framework used for distributed storage and processing of big data sets using the MapReduce programming model.
The Apache (/əˈpætʃiː/; French: [a.paʃ]) are culturally related Native American tribes from the Southwestern United States, and have traditionally lived in Eastern Arizona, Northern Mexico (Sonora and Chihuahua), New Mexico, West Texas, and Southern Colorado.
Apache Subversion (often abbreviated SVN, after its command name svn) is a software versioning and revision control system distributed as open source under the Apache License.
Apathy is a lack of feeling, emotion, interest, and concern. Apathy is a state of indifference, or the suppression of emotions such as concern, excitement, motivation, and/or passion.
Apatosaurus (/əˌpætəˈsɔːrəs/; meaning "deceptive lizard") is a genus of extinct sauropod dinosaurs that lived in North America during the Late Jurassic period.
Apache OpenOffice (AOO) is an open-source office productivity software suite. It is one of the successor projects of OpenOffice.org and integrates features and improvements from IBM Lotus Symphony.
The American Psychological Association (APA) Ethical Principles of Psychologists and Code of Conduct (for short, the Ethics Code, as referred to by the APA) includes an introduction, preamble, a list of five aspirational principles and a list of ten enforceable standards that psychologists use to guide ethical decisions in practice, research, and education.