
 square root 
  Calculation of a square root by hand is a little like longhand division. 
  That is, we have improved our knowledge of the square root by one digit, B. We take whatever remains, scale again by 100, by bringing down two more digits, and repeat the process. 
  Note: In computers and handheld calculators, square root, sine, cosine, and other transcendental functions are calculated with sophisticated functions based on the NewtonRaphson method, sometimes called Newton's method. 
 www.nist.gov /dads/HTML/squareRoot.html (575 words) 
