As a practicing engineer and frequent user of mathematics, I do hereby proclaim:  Temperature units are stupid.  With all other units of measurement (time, distance, velocity, mass, angle, pressure, density, etc.), zero is zero, regardless of which system you use.  Zero inches is zero centimeters.  Zero mph is zero m/s.  Zero lb is zero kg.  But with temperature, zero degrees C is 32 degrees F.  And don't even get me started with Kelvin and Rankine.  Why there are four different units for one stupid measurement is beyond the scale of my angry comprehension. #math