As a Chemical Engineer* by pre-and post-IT-ism, units were the very bread of life. One company I worked for had a US parent whose design programs were all in British units. This side of the pond we wanted metric units. We found there was a switch in the input deck which output the results in metric (though we still needed the inputs in British units, go figure). So we duly started printing (this was the 1980s) the outputs in metric - yes, °C, kg, bar, etc., jolly good. Though one of the stream properties caused raised eyebrows - mPaS, milli-pascal-seconds. This turned out to be the only thing we ever learned from them, since it turned out to be out old viscosity friend, the cP, centipoise.
(*enables you to talk engineering to a chemist, and chemistry to an engineer)