Calculus (Latin) » pebble » Pebbles » the Flintstone’s daughter

(More specifically calculus is the Latin word for a pebble used for calculation, often on a Roman abacus.)

http://en.wikipedia.org/wiki/Calculus

http://en.wikipedia.org/wiki/Calculation

http://en.wikipedia.org/wiki/The_Flintstones

http://en.wikipedia.org/wiki/Pebbles_Flintstone