FFF System
The Furlong/Firkin/Fortnight (FFF) system is a humorous system of units based on outdated or impractical measurements. The length unit of the system is the furlong, the mass unit is the mass of a firkin of water, and the time unit is the fortnight. Like the SI or metre-kilogram-second system, there are derived units for velocity etc.
While the FFF system is not used in practice, it has been used as an example in discussions of the relative merits of different systems of units. Some of the FFF units, notably the microfortnight, have been used jokingly in computer science. Besides having the meaning "any obscure unit", furlongs per fortnight have also served frequently in classroom examples of unit conversion and dimensional analysis.
Read more about FFF System: Base Units and Definitions, Notable Multiples and Derived Units
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