Columbia Encyclopedia
Search results
500 results found
instrument-landing system
(Encyclopedia)CE5 Instrument-landing system (ILS), the most common instrument-landing approach system, uses two beams to guide an airplane. instrument-landing system (ILS), ground-based radio system designed to...Chinese examination system
(Encyclopedia)Chinese examination system, civil service recruitment method and educational system employed from the Han dynasty (206 b.c.–a.d. 220) until it was abolished by the Ch'ing dowager empress Tz'u Hsi in...autonomic nervous system
(Encyclopedia)autonomic nervous system: see nervous system. ...parasympathetic nervous system
(Encyclopedia)parasympathetic nervous system: see nervous system. ...sympathetic nervous system
(Encyclopedia)sympathetic nervous system: see nervous system. ...peripheral nervous system
(Encyclopedia)peripheral nervous system: see nervous system. ...central nervous system
(Encyclopedia)central nervous system: see nervous system. ...horizon coordinate system
(Encyclopedia)horizon coordinate system: see altazimuth coordinate system. ...altazimuth coordinate system
(Encyclopedia)altazimuth coordinate system ăltăzˈəməth [key] or horizon coordinate system, astronomical coordinate system in which the position of a body on the celestial sphere is described relative to an obs...European Launcher Development Organization
(Encyclopedia)European Launcher Development Organization (ELDO): see European Space Agency. ...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 +-
