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@EdwardZ
National standards are now nearly historical. Sure there are still JIS, ISO and Italian but other than Italian threaded bottom brackets--- which tend to be mainly from a few vendors, mainly in Italy (or like Merckx with an Italian pedigree)---- and retaining rings things are in only a few standards.
Before national standards companies all did their own thing.. so the national standards were a big way foward.. the French true to their Napoleonic history adopted a metric based system, the Italians a kind of Imperial Metric, the British true their Imperial system and the Japanese to theirs.. What remains is mainly JIS and ISO.
As a step back, of course, we have a whole new set of proprietary standards for bottom brackets and other components and a number of industry standards that change more often than Ricky Renee could ever change clothing...