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The Solar System

  Comet Hale-Bopp Triton The Flap Over Pluto New Uranian Moons Discovered A Richter Scale for Close Encounter Asteroids Caliban and Sycorax Ultraviolet Death May Follow Asteroid Devastation…

Systems Analyst

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…

portal system

(Encyclopedia) portal system: see circulatory system .