Comment by delta_p_delta_x
Comment by delta_p_delta_x 2 days ago
People have used all sorts of abbreviations for the SI prefixes and SI units for as long as I can remember. I want to ask—are people not taught this in school? I had multiple introductions and revisions of the SI units and SI prefixes in secondary school, pre-university, and university, and every time, a wrong prefix or a wrong symbol was penalised by half a mark per question. I had classmates who mixed them up regularly and lost something like seven marks each time. They learnt very quickly not to, as those seven marks could make one or two grades' difference.
As someone who champions sole use of the SI units, this annoys me to no end.
I've seen things like 'kgs', 'gm', 'gms', 'mtr', 'mt', 'K' instead of 'k' (note capitals) for 'kilo-', mixing 'm' and 'M' (which are supposed to mean 'milli-' and 'mega-' respectively), usage of 'u' instead of 'μ' for 'micro-' (the one exception I will concede is 'mc' in the medical field, because people apparently confused 'μ' and 'm' which results in a 1000× over/underdose), and don't bother with the degree symbol (Alt+numpad 0176 on Windows, Option-Shift-8 on macOS) for °C, or use °K for kelvins (there is no degree, as it is an absolute scale and not relative to anything else, unlike the Celsius/centigrade and Fahrenheit scales), and so many other typographical errors.
https://www.nayuki.io/page/common-mistakes-when-using-the-me...