Columbia Encyclopedia
Search results
500 results found
period, in geologic time
(Encyclopedia)period, unit of time on the geologic timescale. Periods are shorter than an era and longer than an epoch. Periods are of variable length, generally lasting tens of millions of years, with characterist...time and motion study
(Encyclopedia)time and motion study, analysis of the operations required to produce a manufactured article in a factory, with the aim of increasing efficiency. Each operation is studied minutely and analyzed in ord...decorations, civil and military
(Encyclopedia)decorations, civil and military, honors bestowed by a government to reward services or achievements, particularly those implying valor. The practice of bestowing such decorations dates back at least t...International Civil Aviation Organization
(Encyclopedia)International Civil Aviation Organization (ICAO), specialized agency of the United Nations, organized in 1947, with headquarters at Montreal. The objective of the ICAO, which has 190 member nations, i...American Civil Liberties Union
(Encyclopedia)American Civil Liberties Union (ACLU), nonpartisan organization devoted to the preservation and extension of the basic rights set forth in the U.S. Constitution. Founded (1920) by such prominent figur...Civil War, in U.S. history
(Encyclopedia)Civil War, in U.S. history, conflict (1861–65) between the Northern states (the Union) and the Southern states that seceded from the Union and formed the Confederacy. It is generally known in the So...time , sequential arrangement of all events
(Encyclopedia)time, sequential arrangement of all events, or the interval between two events in such a sequence. The concept of time may be discussed on several different levels: physical, psychological, philosophi...civil war, in Roman history
(Encyclopedia)civil war, in Roman history: see Marius and Sulla; Pompey and Julius Caesar. ...Birmingham Civil Rights National Monument
(Encyclopedia)Birmingham Civil Rights National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...Fair Oaks, American Civil War battle
(Encyclopedia)Fair Oaks: see Peninsular campaign. ...Browse by Subject
- Earth and the Environment +-
- History +-
- Literature and the Arts +-
- Medicine +-
- People +-
- Philosophy and Religion +-
- Places +-
- Africa
- Asia
- Australia and Oceania
- Britain, Ireland, France, and the Low Countries
- Commonwealth of Independent States and the Baltic Nations
- Germany, Scandinavia, and Central Europe
- Latin America and the Caribbean
- Oceans, Continents, and Polar Regions
- Spain, Portugal, Italy, Greece, and the Balkans
- United States, Canada, and Greenland
- Plants and Animals +-
- Science and Technology +-
- Social Sciences and the Law +-
- Sports and Everyday Life +-
