Acronyms have been around for a lot time but, in that time - there are acronyms that are duplicated... and it seems to get worse in the trades! It used to be common courtesy to at least type out the words and then put the acronym in parenthesis ... then when you used the acronym, the reader could refer to the above and the words made sense...

At least that's how I was taught but that practice seems to have disappeared into the history.. not complaining.. just venting. LOL 8-)