More glossary items

Greg Ewing (using wmwd2zz02 at
Fri Mar 12 04:11:38 CET 2004

Cameron Laird wrote:
> There are other calculi--"quaternion calculus" and "vector 
> calculus" are two not-too-uncommonly-heard ones.

Indeed, in mathematics the word "calculus" really just
means a method of calculating something. It's actually
the Latin word for "stone", presumably dating back to
the time when people used stones as counters when
doing arithmetic.

Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand

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