<p><img src="https://static4.businessinsider.com/image/60ae6937bee0fc0019d59956-1667/Internet acronym TLDR on keyboard keys with blue background 2x1.png" border="0" alt="Internet acronym TLDR on keyboard keys with blue background" data-mce-source="Alyssa Powell/Insider"></p><p></p><bi-shortcode id="summary-shortcode" data-type="summary-shortcode" class="mceNonEditable" contenteditable="false">Summary List Placement</bi-shortcode><p>If you've spent any time on online forums or in the comments sections of news websites or social media posts, you've more than likely encountered the internet shorthand "TLDR."</p><h2>What TLDR means</h2><p>TLDR is a common online abbreviation that stands for "Too Long Didn't Read." If that sounds a little rude or passive aggressive, you're aptly sensing one of its uses; that is often the way TLDR is used in response to densely worded articles online. While TLDR is the most common usage, you may also see the semicolon inserted in the acronym, as in: "TL;DR." </p><p>Like most memes and acronyms, the origins of TLDR are murky, though the Merriam-Webster dictionary cites the first known use to be in 2002. The meaning of the acronym is pretty obvious, however, and can generally be taken at face valueit's a fast way to say that the referenced article, post, or message is so long that it wasn't worth the full read. </p><aside class="breakout-box headline-regular"><h2><strong>How TLDR is used</strong></h2><p>Like a word with multiple meanings, TLDR is used in several different ways:<br><br></p><ul><li aria-level="1"><strong>As a sarcastic reply.</strong> In likely its most common usage, the abbreviation is used in response to a lengthy article and is generally read as having a bit of a sarcastic or passive-aggressive bite. As a result, it should only be used if you intentionally want to be perceived as leaving a rude comment. As you can imagine, replying to a lengthy email with "TLDR" has exactly the tone you'd expect as if you replied with: "This is too long. I didn't bother to read it."</li><li aria-level="1"><strong>As a summary in comment sections.</strong> It's also common to see TLDR used in a second wayparticularly in the comment sections of articles. It appears as a preface to a summary for others who might not want to wade through the entire source article. For example, you could add a comment to an article that says: "Thanks for the overview. TLDR: This article summarizes why the Nvidia GeForce 3xxx series GPU is in such short supply, demonstrating that cryptocurrency miners are creating the scarcity." </li><li aria-level="1"><strong>As a summary in articles or emails.</strong> Finally, it's not uncommon for TLDR to appear in articles or professional emails. You might see a TLDR section near the start of an article or a lengthy email that serves as an executive summary, delivering key information that eliminates the need to read the entire text. Using the abbreviation instead of the more traditional "Summary" heading can make the article feel more modern or "hip."</li></ul></aside><h2>When to use TLDR in a business setting</h2><p>TLDR is an informal acronym and as such, you should be very careful using it professionally; consider your audience and its comfort level with internet slang. A good rule of thumb is that you would not use "TLDR" anywhere in which you wouldn't feel comfortable writing "LOL" (laughing out loud) or a similarly informal acronym. </p><p>There's probably no scenario in which you should respond to professional messages with "TLDR." As mentioned, this is easily perceived as sarcastic, rude, and unprofessional.</p><p>Even so, it can be appropriate to use TLDR within your communication to signal your own summary. For example, you could place a heading called "TLDR" at the top of a lengthy email and follow it with a bulleted list that summarizes your main points. </p><p>Or, if you are adding a link to a third-party article, you could parenthetically add TLDR with a short summary, such as "Please see<a href="https://www.businessinsider.com/what-is-an-api"> this article</a> (TLDR: It's a summary of how APIs work)."</p><p>Regardless, it's best to err on the side of caution if you have any concern that the use of TLDR is too informal for your audience. </p><bi-shortcode id="related-article-module-end-of-article" class="mceNonEditable"><a data-type="605b9b95df8cbf018d1ec20f" data-title="What is AFK's meaning' The history behind the internet acronym and and how to use it in a chat" data-url="https://www.businessinsider.com/afk-meaning" data-vertical="sai" data-image="https://i.insider.com/60a2cbcef27b4c0019444ef0">What is AFK's meaning' The history behind the internet acronym and and how to use it in a chat</a><a data-type="60998bc5df0dbb5ef55a9934" data-title="What does NSFW mean' Understanding the internet shorthand used to describe content that's not suitable in professional settings" data-url="https://www.businessinsider.com/nsfw-means" data-vertical="sai" data-image="https://i.insider.com/60ac0f3ea412370019d31b45">What does NSFW mean' Understanding the internet shorthand used to describe content that's not suitable in professional settings</a><a data-type="60a2bcff68059d760c017d6d" data-title="'OP' can mean 2 different things online. 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