Which non-SI units are accepted for use with the SI?

SPOILER ALERT:
The official UK and USA metrology websites are INACCURATE

Since the inception of the International System of Units (SI) in 1960, it has always been recognised that some non-SI units, such as the litre, minute and hour, are “widely used and are expected to continue to be used for many years”.

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Early Metrication on Southern African Railways

During the last decade of the nineteenth century, events in Southern Africa were dominated by the gold rush as adventurers scrambled to exploit the newly discovered in the Johannesburg area. This and the egos of and animosity between the financier and Cape Colony prime minister Cecil John Rhodes and the aging and dour president of the Transvaal Republic Paul Kruger resulted in the Anglo-Boer War of 1899-1902.

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Non-metric units in the Paris 2024 Olympic Games

If like me, you are a fan of the Olympic Games, over the last 16 days you have probably enjoyed seeing the metric system used almost exclusively in TV coverage of the Games. It seems that the tendency, all too common in the 1970s, for British TV commentators to convert heights jumped, and distances thrown, into feet and inches, is definitely a thing of the past.

However, whilst most of the events, such as athletics, swimming and cycling, could be said to be exclusively metric, a few events still made use of non-metric measurement units.

Now that the Paris 2024 Olympic Games have come to a close, we take a look at some of the last hold-outs of non-metric units.

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Iceland supermarkets lead the way for litre-based sizes of own-brand milk

So far, Iceland seems to be the only major British supermarket that is selling own-brand milk and all other milk brands in litre-based sizes. Why haven’t any other major supermarkets followed suit by dropping pint-based milk sizes?

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