The compromise that emerged was UTC, which conforms to the pattern for the abbreviations of the variants of Universal Time (UT0, UT1, UT2, UT1R, etc.).
ISO
International Organization for Standardization
The International Organization for Standardization in French is Organisation internationale de normalisation
Why are they like this?
From their website:
Many languages, one name: ISO
Because “International Organization for Standardization” would have different acronyms in different languages (IOS in English, OIN in French for Organisation internationale de normalisation), its founders opted for the short form “ISO”. The story goes that ISO is derived from the Greek word “isos”, meaning equal.
Whatever the country, whatever the language, we are always ISO.
In case anyone is curious, here’s what Wikipedia has to say about this: