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When I did a search for FFU, it redirected to US Customary
units.
Here is the first paragraph:
U.S. customary units(Redirected from FFU) [edit] The
U.S. customary units (more commonly known in the US as
English units and sometimes refered to as Fred
Flintstone units, FFU) are the non-metric units of measurement
that are presently used in the United States, in some
cases alongside the metric system of units.
This system of units is similar to the Imperial system
(sometimes called the British system) once used in the United Kingdom and The Commonwealth, but
has some differences. Both systems derive from the units which developed over
the centuries in England. Today U.S. customary
units are defined in terms of SI units. |
