Mathematica has added the ability to calculate with units of measurement to its namesake software. Users can now add kilometers and miles together, or compare pounds to kilograms. The software supports units of measurement from a wide variety of sciences, including physics, chemistry, astronomy and engineering.
For the home edition, Mathematica 9 starts at US$295 for a one-time license, or $149 per year. The standard edition starts at $2,495, or $995 per year.