Definition:FPS

Definition
FPS is the foot-pound-second standard system of units of measurement.

It is otherwise known as the imperial system, and was used throughout the British Empire until the mid-20th century.

It is not much used nowadays, as most nations have converted to the SI system based on the metre-kilogram-second base units.

As there are several systems similar to this one, some of which use the same name for subtly different standard units, the use of SI units is strongly encouraged.

No attempt is likely to be made on this site to go into a great deal of detail on this particular subject.

Foot
The foot is a measure of length, defined in metres to be exactly $0.304 \, 8 \ \mathrm m$.

Pound
The pound is a measure of mass, which has a number of different standards, the most common being defined in kilograms to be exactly $0.453 \, 592 \, 37 \ \mathrm{kg}$.