Other important counting tools include: the slide rule, the calculator, the tally stick.

FORBES: No. 2 The Abacus

There were only two, 1990-91 and 2000-01, the latter not even counting as a recession by the old rule of needing two consecutive quarters of negative growth.

FORBES: The Modern Cycle Of Economic Boom And Bust

Courts have ruled against schools that have tried to designate cheerleading as a sport for purposes of counting male and female athletes under the federal rule.

FORBES: Why Pediatricians Want Cheerleading To Be Called A Sport