This quote helps demonstrate the *******, scope, and nature of this encyclopedia. The rich ******* covers the gamut from Abacus to Zero. Coverage is given to figures in mathematical history and development such as Galileo, Grace Hopper, and Pythagoras. Careers that rely on mathematics, like air traffic controller, insurance agent, radio disc jockey, and stonemason, have one-half to one-page articles describing how mathematics and a knowledge of it are essential to the profession. Standard mathematical and arithmetical topics are covered as well. The numerous contributors include college and university professors, K-12 teachers, and curriculum specialists