FFF is a program that will help you with lots of calculations and conversions that may come in handy on a farm (though many may be useful in other areas as well. Includes conversions for area, volume, decimal to fraction, length of antennas, electrical formulas, power/work/energy formulas, a table of weights and measures, metric conversions, and pully speed, grain weights (wet/dry), concrete cubic yards, board-feet for lumber, and gestation calculations.