v5.3 [Nov 12, 2008]
New in this version: The ability to perform coordinate transformations from latitude/longitude. They also added Heat Flux, Magnetic Flux, Volumetric Heat Generation, Fuel Consumption, Enthalpy, Data Transfer, and Amount of Substance categories and units. Additionally Find an Invert functions were added.
Other new features include the ability to enter additional complex expressions in the Input Box and more units in distinct categories.
ProKon - is an amazing engineering calculator with multiple conversion and calculation modules.
The Relief Data is a tool created by the Philippine's Bureau of Internal Revenue