The Flap Over Pluto
New Uranian Moons Discovered
A Richter Scale for Close Encounter Asteroids
Caliban and Sycorax
Ultraviolet Death May Follow Asteroid Devastation… What is this job like? These workers figure out how to use computers to get things done. They tell businesses and other organizations which computers and software to buy, and they decide how… (Encyclopedia) cardiovascular system: see circulatory system . (Encyclopedia) gastrointestinal system: see digestive system . (Encyclopedia) geocentric system: see Ptolemaic system . (Encyclopedia) portal system: see circulatory system . (Encyclopedia) examination system: see Chinese examination system . (Encyclopedia) heliocentric system: see Copernican system . (Encyclopedia) seignorial system: see manorial system ; feudalism . (Encyclopedia) duodecimal system: see numeration .