I'd like to throw something out that I'd love to see in an (open) calculator like this that I've only ever seen implemented in some software calculators. I'd lo

I'd like to throw something out that I'd love to see in an (open) calculator like this that I've only ever seen implemented in some software calculators. I'd love to have a physical hardware dedicated calculator that would understand units and boast an easy to use multiple-variable solver. I'd love to be able to ask my calculator questions like this: We have a sensor attached to a device that moves at 100 feet/second. Our sensor can be configured to sample it's location at a frequency in GHz. What frequency do we need to sample at to make sure that no to samples are further than 12 U (rack units) apart. (100 feet/second) / (x GHz) = (12 U) [0] I'd like to also be able to have user programmable units by allowing users to create a file that looks like this. I'd hopefully be able to create this on my desktop and push it to my calculator. On the multivariable solver-front I'd like to be able to define constraints and get a sensible answer. Something like... solve(x, y, z, min(x), y=10, z > .3, min(f(x)), max(g(z))) Something like that... I haven't thought it through. [0] - My answer: http://i.imgur.com/pimZnwq.png http://i.imgur.com/pimZnwq.png