As yardsticks to measure the effectiveness of information retrieval there exist those called 'recall ratio' and 'precision ratio'.

Americans are said to regard the amount of money a man makes as a criterion of his ability.

Man is the measure of all things.

Money is the measure of worth.

The calorie is an exact measure of the energy in food.

Man is the measure of all things: of things which are, that they are, and of things which are not, that they are not.