Horsepower
I always wondered where the term horsepower came from. Does one horse have one horsepower? Well according to Wikipedia ...

The horsepower was first used by James Watt during a business venture where his steam engines replaced horses. It was defined that a horse can lift 33,000 pounds force with a speed of 1 foot per minute: 33,000 ft·lbf·min-1. This is sometimes called a mechanical horsepower to distinguish it from the other definitions of horsepower below. Wikipedia

Well, one question answered and then another question answered that I didn't even think to ask. Apparently the Watt came before the horsepower. Who knew? No one gave a shit until the steam engine came about. People just counted the number of horses required for a task and it was all done.