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According to Your Dictionary¹:

  • Abbreviations: St. for Street and Saint, Mr. for mister
  • Acronyms: radar for radio detection and ranging
  • Initialisms: aka for also known as, FBI for Federal Bureau of Investigation

The difference between acronymns and initialisms is that acromyms form new words, while initialisms are pronounces letter-by-letter.

People who are familiar with programming, databases, or library science are well familiar with the ID abbreviation, which stands for identifier.

But there is another one "thing", UID, which stands for unique identifier. It doesn't look as a pure abbreviation (because there are two words) or a pure initialism (because the first words is trimmed to two letters). So what it is?

¹ https://abbreviations.yourdictionary.com/articles/what-is-the-difference-between-an-abbreviation-and-an-acroynm.html

user90726
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  • Comments are not for extended discussion; this conversation has been moved to chat. – tchrist Dec 26 '20 at 19:17
  • @tchrist Please make sure that when you move a discussion to the chat, the discussion does not contain anything really helpful or they are long enough to not be automatically deleted. The discussion you have moved is now gone and as far as I remember, there were some helpful comments. I write this because this is not the first time when you moved a useful discussion to the chat and it was disappeared :-/ And of course thank you for your work as moderator. – user90726 Jan 10 '21 at 21:44

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