Electronics manufacturing uses both with about equal frequency, often without unit names attached, and it's confusing as all hell, at least as a hobbyist. E.g.

Electronics manufacturing uses both with about equal frequency, often without unit names attached, and it's confusing as all hell, at least as a hobbyist. E.g. a 0603 footprint can mean 0.6×0.3 mm or 60×30 mils. https://eepower.com/resistor-guide/resistor-standards-and-codes/resistor-sizes-and-packages/ https://eepower.com/resistor-guide/resistor-standards-and-co...