Acronyms are words which were created by taking the first letter (or several letters) of each word of a phrase.

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Do you use “a” or “an” before acronyms?

99% of the time, I'm clear on when I should use "a" versus "an." There's one case, though, where people & references I respect disagree. Which of the following would you precede with "a" or "an," ...
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What is the correct way to pluralize an acronym?

For example, if I wanted to write the equivalent of There are many automated teller machines in this city. Would it be There are many ATMs in this city. or There are many ATM's in ...
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Plurals of acronyms, letters, numbers — use an apostrophe or not?

When I was in high school back in the 1970s, I was taught that to make a plural of an acronym, a letter, or a number, one should add an apostrophe and "s". Like I would have written this sentence, "......
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Difference between an acronym and abbreviation?

TLA is an acronym for "Three Letter Acronym". Is it also an abbreviation, since it abbreviates the original phrase?
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Why did they spell it “URL’s”?

I was reading this documentation file of some software and note the plural spelling of this abbreviation is “URL’s”. Why isn’t it “URLs”?
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Using the definite article with acronyms and initialisms

I'm wondering when to use or not to use the definite article, when using acronyms or initialisms in a sentence. Is there a rule for this, or does it depend on the context? For example, let's look at ...
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Is IOU an abbreviation, an acronym, or an initialism?

IOU stands for I owe you and we pronounce each letter separately. But how do we classify that construction"? abbreviation: a shortened form of a word or phrase acronym: an abbreviation formed from ...
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1answer
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Does pronouncing an initialism make it an acronym?

One definition of an acronym is: An abbreviation formed by (usually initial) letters taken from a word or series of words, that is itself pronounced as a word, such as RAM, radar, or scuba; ...
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Proper Apostrophe Usage with Initialisms: CCS' or CCS's?

I work with a company whose name is frequently reduced to an initialism (acronym). Let's say the name is "Cool Computer Systems" (CCS). I am engaged in an ongoing, bloody battle with the marketing ...
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Is there a word for an acronym which spells out one of its component words?

The example I am thinking of is GNU, which stands for "GNU's not unix". It may be that there are no other examples. And maybe that's the whole joke. I was just wondering.
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What is the commonly accepted pronunciation of FAQ?

I hear FAQ(s) pronounced like a word in "FACK(s)", while I go letter by letter. In usage, what is more common? (Similar to SQL vs Sequel)
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“PIN Number” — why do we say it?

We often say "PIN Number", this is part of everyday conversation. But why? PIN stands for Personal Identification Number, so what we're actually saying is Personal Identification Number Number. Is ...
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Pronouncing acronyms

I've noticed that some people in my office spell out "data import tool" as D. I. T., whereas others will say "dit" (like "ditty"). Is trying to pronounce an acronym as a word, as opposed to spelling ...
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Past participle of a verb created from an acronym

Standard GPL would require that those applications be GPL'd (or compatible licensing), whereas LGPL requires only the library's source to be made available. Is the use of words like GPL'd common to ...
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When did the use of acronyms begin? [closed]

What are some of the earliest acronyms and did they know it was an acronym at the time?
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Can a word that sounds the same as the way it is spelt be an initialism and an acronym?

Initialisms are pronounced as words and acronyms are spelt letters. However, some words sound the same, said and spelt. e.g. Input Output can be abbreviated as IO. It can be spelt I-O or pronounced ...
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Plural form of the acronym LASER

I'm writing a technical report and must use the plural form of LASER. Seeing as it is an acronym, how does one add the 's'?
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AM/PM vs a.m./p.m. vs am/pm

I used to think PM/AM was correct, but at some point, I switched to using p.m./a.m. for reasons I can't recall. I know that in practical, casual writing, people tend to use whatever form is most ...
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Of Yuppies and Yippies and Hippies

While innocently passing by on my way to Big Rep City, I happened to overhear (alright! I was dropping eaves) a dialogue in some podunk Commentary Cafe wherein two fellow ELU consumers were debating ...
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Opposite of acronym

If U.N. is the acronym of United Nations, then United Nations is the what of U.N.? Is there an opposite of acronym?
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Why isn't USA an attributive adjective, (but US is)?

When referring to the country, both US and USA (among other forms), are acceptable. But when used as an adjective, USA sounds wrong. US Army, but not USA Army. Even in the expanded form (for ...
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When does an acronym lose its capitalization, e.g. RaDAR 'radar'?

The reason that I ask is because this is happening to LiDAR, and I am inclined to use lidar because it is easier to read.
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Is it acceptable to omit the last period of an acronym?

After reading this post, I was struck by the omission of the period (full stop) at the end of the acronym given. A.V.C I've never seen this before here in the States. Is it permissible here? In ...
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Defining an acronym when using the plural of the term? [duplicate]

Possible Duplicate: What is the correct way to pluralize an acronym? I am defining an acronym which will be substituted for some unwieldy term in a document. One thing Gary has talked ...
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Is “off” also an acronym?

I found the term off used in the following way (technical document): ... a total of two (2 off) Single radio channels ... While the meaning seems pretty clear, I'd like to know what off stands ...
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Why use BCE/CE instead of BC/AD?

When I was a kid, I was always taught to refer to years using BC (Before Christ) and AD (Anno Domini / year of our Lord). However, I somewhat regularly hear people referring to years as in the CE (...
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Are the acronyms FYI, BTW, LOL, WTF now considered “normal” words?

Are these "words" moving out of the elitist slang stage and into popular usage? It is hard for me to tell, because in the techie culture I work in they are ubiquitous. However, I've tried them out ...
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Is the meaning of the acronym “FAQ” generally understood?

When people see the acronym FAQ, I wonder if they really know what it stands for or whether they just understand the concept. Is this true for most native English speakers?
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Can “sitcom” be considered an “acronym”? A Syllabic Acronym? Or a Hybrid Acronym?

ACRONYM - An abbreviation formed from the initial letters of other words and pronounced as a word http://www.oxforddictionaries.com/definition/english/acronym Much has been written about acronyms ...
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Why is the plural acronym “CSS” treated as singular?

CSS stands for Cascading Style Sheets, which is a plural phrase. One would say: Cascading Style Sheets are used to provide a central location for all of the stylings of a project. However, it ...
12
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Is an apostrophe with a decade (e.g. 1920’s) generally considered “incorrect”?

I typically don’t use an apostrophe with plurals in any situation, but I always assumed that the use of an apostrophe in constructions like acronyms: Forty BA’s were given out to students this ...
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Proper capitalization of commonly used acronyms

I was always under impression, that acronyms ought to be written all caps. However reading BBC News site very often I see some of the common acronyms written as proper names (first cap). For example "...
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Is there a word for the definition of an acronym?

I can describe "IMHO" as an acronym for "in my humble opinion." How can I describe the reverse processes of translating the acronym into the actual phrase? That is to say, if "IMHO" is the acronym, ...
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Is it appropriate to treat “FYI” as a noun?

Since FYI stands for "for your information", I would tend to use it like this: FYI, I think the fish has gone bad. In other words, the acronym simply replaces the phrase. However, I've heard FYI ...
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Pluralization of acronyms ending in 'S'

What is the proper way to pluralize acronyms ending in the letter 'S'? The particular acronym under study in this case is T.A.R.D.I.S. The various forms I believe are correct are: TARDISes T.A.R.D....
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“An” or “A” with acronyms which sound like they start with a vowel? [duplicate]

Possible Duplicate: Do you use “a” or “an” before acronyms? Should you use "a"n or "a" with acronyms which sound like they start with a vowel when read literally? ......
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“An RV” or “a RV”? [duplicate]

Possible Duplicate: Do you use “a” or “an” before acronyms? I am writing about Random Variables, which I am abbreviating to RV. Should I write 'an RV' (an Arr-Vee) or '...
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Usage of YMMV: Can I use it in day-to-day conversation?

I found the word YMMV in an answer to my question "How important to write down mission statement in learning English? Do I have to?", which I posted on January 6. As YMMV is a quite strange word to me,...
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Correct capitalization for “of” in an acronym definition

For an acronym that includes the word "of", do you capitalize its usage within the definition (or expansion) of the acronym For example, in the follow sentence: My coworker Steve suffers from ...
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What is the correct way to define an acronym when its first appearance is plural? [closed]

The question and answers posed in What is the correct way to pluralize an acronym? deals very nicely with acronym (and possibly initialism) usage. What about the case when you are defining the acronym?...
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Is the second period necessary after an abbreviation?

Which one of the following is correct? only in the continental U.S.A. For all other countries... only in the continental U.S.A.. For all other countries... I am not sure if I need two periods ...
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Should acronyms that are actually hidden plurals be treated as plural?

The term Generally Accepted Accounting Principles is abbreviated as GAAP. (Actually, I don't know if it is an initialism and each letter is spoken, or whether it is pronounced as gap, sorry.) Now, I ...
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1answer
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Pluralizing abbreviations where the noun is not the last word

For abbreviations - both acronyms and initialisms - where the last word in the abbreviation is the noun, I'm accustomed to adding an 's' with no apostrophe (e.g. ATMs), as described in the answer to ...
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Is 'acronymise/ze' a word? Is it used only colloquially, if at all?

I just sent a text to a friend, who didn't understand an acronym I used for a game: "Ah, I said it in a previous text so thought it was ok to abbreviate it." Though, since it was an acronym I ...
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How to avoid repeating a word already contained in “RAID”?

I was recently answering a question on Super User about RAID. In this context RAID means "redundant array of independent (or inexpensive) disks". I wanted to point out to fellow user that he should ...
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Which acronyms are used for epochs? How are the acronyms placed?

For example, I usually use 560 BCE 1066 CE As opposed to the traditional: 560 BC AD 1066 Some people, when using AD, place it after the year: 1066 AD How are epochs commonly denoted?
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How to use fully qualified acronyms

Which is proper/acceptable? Take for instance this sentence: We would like to use IBM machines. Now consider that I needed to fully qualify IBM... How do I make this not read strangely? We ...
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Proper to add tense to acronyms, abbreviations and initialisms

What is the correct way to pluralize an acronym? asked about pluralising acronyms, abbreviations and initialisms, but is there a standard way to add verb endings e.g. -ing and -ed (what are these ...
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How can I tell when an abbreviation is an acronym?

I know an acronym is an abbreviation that can be pronounced as one word, but when is an abbreviation pronounced as one word? Making myself clearer, how do we know whether or not it is pronounced as ...
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Word or phrase that describes a group of acronymic initials that can be any order

Typical acronyms represent a phrase with a fixed word order. For example, NATO (North Atlantic Treaty Organization) is not coherent when reordered to, say, ATNO (Atlantic Treaty North Organization). ...