| Aristotle | Archaeology | Arithmetic mean |
| Architecture (disambiguation)Architecture is a term that has over history acquired different, though indirectly related, meanings all of which have currency today. Architecture in its first and traditional usage, refers to the art and science of designing buildings. A wider definitio | Arithmetic and logical unitALU redirects here. Alternative meaning: Alu sequence. An arithmetic and logical unit (ALU is one of the core components of all central processing units. It is capable of calculating the results of a wide variety of common computations. The most common av | ArraignmentArraignment is a common law term for the formal reading of a criminal complaint, in the presence of the defendant, to inform him of the charges against him. In response to arraignment, the accused is expected to enter a plea. Acceptable pleas vary from ju |
| ArgumentArgument may refer to: (in logic) a logical argument that is, an attempt to proved a demonstration of the truth of a conclusion based on the truth of a set of premises (in mathematics) at least three different things: a parameter or independent variable t | Argument formIn logic, the argument form or test form of an argument results from replacing the different words, or sentences, that make up the argument with letters, along the lines of algebra; the letters represent logical variables''. The sentence forms which class | ArubaAruba is an island in the Caribbean Sea, just a short distance north of the Venezuelan Paraguana Peninsula, and it forms a part of the Kingdom of the Netherlands. It is very dry, with little of the tropical vegetation that many expect in the Caribbean. |
| Articles of ConfederationThe Articles of Confederation was the first governing document of the United States of America. The Articles combined the colonies of the American Revolutionary War into a loose confederation. The second Continental Congress adopted the Articles of Confed | Arthur KoestlerArthur Koestler ( September 5, 1905 1983) was a novelist, political activist, and social philosopher. He was the author of many popular books including Arrow in the Blue (Volume I of his autobiography), The Yogi and the Commissar (another book about Commu | Arthur SchopenhauerArthur Schopenhauer ( February 22, 1788 September 21, 1860) is one of the most important 19th century philosophers, most famous for his work, The World as Will and Representation''. He is known for having espoused a sort of philosophical pessimism that sa |
| Arctic Ocean | Arctic Circle | Argentina |
| Armenia | Art | Aries |
| Arabic language | Arthur C. Clarke | Argon |
| Arsenic | Arable land | Arne Kaijser |
| Archipelago | Arthur Conan Doyle | Archie |
| Aramaic alphabet | Arguments for the existence of God | Arches National Park |
| Arecales | Aristophanes | Ardipithecus |
| ARY Digital | Artificial intelligence | Architect |
| Articles of Faith | Artistic revolution | Area |
| Artist | Archaea | Arthur Meighen |
| Arianism | Argot | Arminianism |
| Aromatic hydrocarbon | Arabian Prince | Army |
| Arachnophobia | Arthur Aikin | Arnold Matthew |
| Arthritis | Arabic numerals | Arnold Schwarzenegger |
| Archimedes | Archimedean solid | Aromatic compound |
| Arizona State University | Art Deco | Argo Navis |
| Ara | Arkansas | Arizona |
| Architectural engineering | Argument from common consent | Argument from morality |
| Archery | Arbor Day | Ares |
| Array | Aristide Maillol | Ark |
| Arizona Cardinals | Arene | Arizona Diamondbacks |
| Ark of the Covenant | Armour | Armoured fighting vehicle |
| Artistic License | Arsenal F.C. | Arcadius |
| Arab | Armadillo | Arabs and anti-Semitism |
| Arcology | Arabic alphabet | Arctic fox |
| Armenian language | Ariel | Arthur Stanley Eddington |
| Armoured personnel carrier | Armored car | Aramaic language |
| Arthur Miller | Area 51 | Archbishop of Canterbury |
| Ardal O'Hanlon | Arrangement | Arthropod |
| Art conservation and restoration | Arc de Triomphe | Artillery |
| Arnulf of Carinthia | Articolo 31 | Aromatherapy |
