A (named /ˈeɪ/, plural As, A's, as, a's or aes) is the first letter and the first vowel in the ISO basic Latin alphabet.
Australia (/əˈstreɪliə/, /ɒ-/, /-ljə/), officially the Commonwealth of Australia, is a country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands.
Animals are multicellular, eukaryotic organisms of the kingdom Animalia (also called Metazoa). The animal kingdom emerged as a clade within Apoikozoa as the sister group to the choanoflagellates.
Automation or automatic control, is the use of various control systems for operating equipment such as machinery, processes in factories, boilers and heat treating ovens, switching on telephone networks, steering and stabilization of ships, aircraft and other applications and vehicles with minimal or reduced human intervention.
An arthropod (from Greek ἄρθρον arthron, "joint" and πούς pous, "foot") is an invertebrate animal having an exoskeleton (external skeleton), a segmented body, and jointed appendages (paired appendages).
Africa is the world's second-largest and second-most-populous continent. At about 30.3 million km² (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area and 20.4% of its total land area.
Austria (/ˈɒstriə, ˈɔː-/; German: Österreich [ˈøːstɐˌʁaɪç]), officially the Republic of Austria (German: Republik Österreich, listen ), is a federal republic and a landlocked country of over 8.7 million people in Central Europe.
The American Civil War was an internal conflict fought in the United States (U.S.) from 1861 to 1865. The Union (i.e., The United States) faced secessionists in eleven Southern states grouped together as the Confederate States of America.