FNA is a multi-function scientific calculator and unit conversion utility. Four modes of operation (statistics, trigonomety, base-n, and unit conversion). Convert units of Acceleration, Angle, Area, Density, Energy, Force, Fuel Efficiency, Length, Mass/Weight, Power, Pressure, Speed, Temperature, Time, Torque and Volume. Perform complex mathematical calculations using such operations as factorial, gamma, combinations, permutations, logarithms, standard and hyperbolic trigonometric functions, and base-n conversions and logical operations. Store and recall even between sessions with 26 separate memory registers. Special calculations include heat index, wind chill and days between dates. Built-in references now include Periodic Table of Elements with extensive chemical data, drop-down conversions for metric prefixes, counting units and atomic weights.