Why is it.................?

[Syndrome]

Originally Posted by FoxtrotGolfXray 5.0

...that people insist on putting an apostrophe before the 's' when they pluralise an acronym or initialisation?

eg PIN's or ATM's.

You don't add an apostrophe to cars or clouds or pies (unless it is being used as a possessive noun). So why do it to an acronym or initialisation?

Why is it when we try to help our fellow humans by offering them advice or suggestions, instead of being grateful they call us a grammar Nazi?