Revolves around measuring weight, length, distance and currency in units that actually do not make sense, unlike the metric system which has been taken on board by most countries and is used in all science.
metric system : 10 milimetres is a centimetre. 100 centimetres is a metre. 1000 metres is a kilometre.
Which system makes sense?
Revolves around measuring weight, length, distance and energy etc. in units that actually do make sense - inch - called 'un pouce' in French is the length of the first digit of your thumb; span is the span of a man's hand fingers outstretched; a foot - 'un pied' in French - is - well . . . - the length of a foot; a yard