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3M (originally Minnesota Mining and Manufacturing) is now just a name, which means nothing. Same for KFC (once Kentucky Fried Chicken). It may be more common in company names or other legally-fraught acronyms.

I guess BRICS:

> In August 2023, at the 15th BRICS Summit, South African President Cyril Ramaphosa announced that Argentina, Egypt, Ethiopia, Iran, Saudi Arabia and the United Arab Emirates had been invited to join the bloc. Full membership will take effect on 1 January 2024.

Not exactly the same but UTC is an interesting one, it's an acronym for "coordinated universal time", but is in the wrong order as a compromise to the French that wanted "temps universel coordoné"

Similarly the Big Ten football conference is now 14 teams.

At one point the big ten had 12 teams and the big 12 had ten teams...