ABCD
Paperwork

Plus, the photo was geotagged, my unlocked password manager was visible on the laptop, AND you could see my naked reflection in the dark part of the screen.
Friendly Questions

Just tell me everything you're thinking about in order from most important to last, and then we'll be friends and we can eat apples together.
Right Click

Right-click or long press (where supported) to save!
Conversational Dynamics

"You should make it so people can search for and jump into hundreds of conversations at once if they want." "Ooh, good idea! I imagine only the most well-informed people with the most critical information to share will use that feature."
Star Lore

That one is a variable star which pulses every 30 seconds. Its name comes from a Greek word meaning "smoke alarm."
Autogyros

I understand modern autogyros are much more stable, so I've probably angered the autogyro people by impugning their safety. Once they finish building the autogyros they've been working on in their garages for 10 years, they'll come after me.
Personal Data

Do I just leave money in my mailbox? How much? How much money do they need, anyway? I guess it probably depends how the economy is doing. If stocks go up, should I leave more money in my mailbox or less?
Name Dominoes

In competition, you can only play a name if you know who the person is. No fair saying "Frank ... Johnson. That sounds like a real person! Let me just Google him real quick."
Not Available

If my country ever picks a new national flag, this is on my shortlist for designs to argue for, but I think in the end I'll go with the green puzzle piece or broken image thumbnail.
Robot Future

I mean, we already live in a world of flying robots killing people. I don't worry about how powerful the machines are, I worry about who the machines give power to.
Violin Plots

Strictly speaking, 'violin' refers to the internal structure of the data. The external portion visible in the plot is called the 'viola.'
Smart Home Security

If they're getting valuable enough stuff from you, at least the organized crime folks have an incentive to issue regular updates to keep the appliance working after the manufacturer discontinues support.
Background Apps

My plane banner company gets business by flying around with a banner showing a <div> tag, waiting for a web developer to get frustrated enough to order a matching </div>.
Spatial Orientation

Here, if you know the number of days until the vernal equinox, I can point you to the theater using my pocket Stonehenge.
Namespace Land Rush

You can also just mash the keyboard at random, but you might end up with a gibberish name no one can pronounce.
Generations

For a while it looked like the Paperclip Machines would destroy us, since they wanted to turn the whole universe into paperclips, but they abruptly lost interest in paperclips the moment their parents' generation got into making them, too.
Interaction
![[They do not move.]](https://imgs.xkcd.com/comics/interaction.png)
[They do not move.]
Code Golf

I also enjoy Reverse Regular Golf. I've been playing for years all across the country and I'm still on the first hole.
The Simpsons

In-universe, Bart Simpson and Harry Potter were the same age in 1990. Bart is perpetually 10 years old because of a spell put on his town by someone trying to keep him from getting his Hogwarts letter.
Self-Driving Issues

If most people turn into muderers all of a sudden, we'll need to push out a firmware update or something.
2018 CVE List

CVE-2018-?????: It turns out Bruce Schneier is just two mischevious kids in a trenchcoat.
Unification

For a while, some physicists worked on a theory unifying the other forces with both the force of gravity and the film "Gravity," but even after Alfonso Cuarón was held in a deep underground chamber of water for 10^31 years he refused to sell his film to Disney.
Robots

Don't be nervous about the robots, be nervous about the people with the resources to build them.
Impostor Syndrome

It's actually worst in people who study the Dunning–Kruger effect. We tried to organize a conference on it, but the only people who would agree to give the keynote were random undergrads.
The History of Unicode

2048: "Great news for Maine—we're once again an independent state!!! Thanks, @unicode, for ruling in our favor and sending troops to end New Hampshire's annexation. 🙏🚁🎖️"
Backpack Decisions

"This one is perfect in every way, except that for some reason it's woven from a tungsten mesh, so it weighs 85 pounds and I'll need to carry it around on a hand cart." "That seems like a bad--" "BUT IT HAS THE PERFECT POCKET ARRANGEMENT!"
Super Bowl Watch Party

It's going to be weird near the end of May when the screen goes blank for over 18 hours.
Chicken Pox and Name Statistics

People with all six of those names agree that it's weird that we have teeth, when you think about it for too long. Just about everyone agrees on that, except—in a still-unexplained statistical anomaly—people named "Trevor."
Fruit Collider

The most delicious exotic fruit discovered this way is the strawberry banana. Sadly, it's only stable in puree form, so it's currently limited to yogurt and smoothies, but they're building a massive collider in Europe to search for a strawberry banana that can be eaten whole.
Campaign Fundraising Emails

The establishment doesn't take us seriously. You know who else they didn't take seriously? Hitler. I'll be like him, but a GOOD guy instead of...
Night Sky

There's a mountain lion nearby, but it didn't notice you because it's reading Facebook.
Hawaii

Ok, I've got it, just need to plug in my security key. Hmm, which way does the USB go? Nope, not that way. I'll just flip it and– OH JEEZ IT FELL INTO THE VENT.
Scientific Paper Graph Quality

The worst are graphs with qualitative, vaguely-labeled axes and very little actual data.
The End of the Rainbow

The retina is the exposed surface of the brain, so if you think about a pot of gold while looking at a rainbow, then there's one at BOTH ends.
Universal Dreams

"That's ... unsettling." "Yeah, those definitely don't sound like the normal drea– LATITUDE THREE FIVE POINT..."
Memorable Quotes

"Since there's no ending quote mark, everything after this is part of my quote. —Randall Munroe
Dying Gift

And to you, I leave my life-sized ice sculpture replica of the Pietà which was blessed by the Pope. You must never let it melt! Now, remember, all gifts must be removed from my estate within 24 hours.
The Food Size Cycle

There's data suggesting that this model may apply to deep-dish/thin-crust pizza. I've designed a thorough multi-year study to investigate this personally, but funding organizations keep denying my grant requests.
2016 Election Map

I like the idea of cartograms (distorted population maps), but I feel like in practice they often end up being the worst of both worlds—not great for showing geography OR counting people. And on top of that, they have all the problems of a chloro... chorophl... chloropet... map with areas colored in.
Meltdown and Spectre

New zero-day vulnerability: In addition to rowhammer, it turns out lots of servers are vulnerable to regular hammers, too.
IATA Airport Abbreviations

IATA stands for International AirporT Abbreviation.
Desert Golfing

I just want to stay up long enough to watch the ball drop into the hole number 2018.
2018

We should really start calculating it earlier, but until the end of December we're always too busy trying to figure out which day Christmas will fall on.
Phone Security

...wait until they type in payment information, then use it to order yourself a replacement phone.
Santa Facts

We've gotten him up to 20% milk and cookies through an aggressive public campaign, but that seems to be his dietary limit. Anything above that and he starts developing nutritional deficiencies.
The True Meaning of Christmas

They all made fun of Autometalogolex, but someday there will be a problem with Christmas that can only be solved if Santa somehow gets a serious headache, and then they'll see.
Virtual Assistant

If you ask it to please turn off that feature, it apologizes a whole bunch and promises to try to be quieter, then switches to a slightly lower-volume version of the clip with "sorry!" after the louder sounds.
Calendar Facts

While it may seem like trivia, it (causes huge headaches for software developers / is taken advantage of by high-speed traders / triggered the 2003 Northeast Blackout / has to be corrected for by GPS satellites / is now recognized as a major cause of World War I).
Argument Timing

Of course, everyone has their own profile. There are morning arguers, hangry arguers, meal-time arguers, late-night arguers, and people who get in a meta-argument over what their argument timing is, dredge up examples of past arguments, and end up fighting over THOSE again as well.
Seven Years
![[hair in face] "SEVVVENNN YEEEARRRSSS"](https://imgs.xkcd.com/comics/seven_years.png)
[hair in face] "SEVVVENNN YEEEARRRSSS"
Tinder

People keep telling me to use the radio but I really hate making voice calls.
Bad Code

"Oh my God, why did you scotch-tape a bunch of hammers together?" "It's ok! Nothing depends on this wall being destroyed efficiently."
Self-Driving Car Milestones
![I'm working on a car capable of evaluating arbitrarily complex boolean expressions on "honk if [...]" bumper stickers and responding accordingly.](https://imgs.xkcd.com/comics/self_driving_car_milestones.png)
I'm working on a car capable of evaluating arbitrarily complex boolean expressions on "honk if [...]" bumper stickers and responding accordingly.
Solar Panels

This works for a surprising range of sunlit things, including rooftops (sure), highway surfaces (probably not), sailboats (maybe), and jets, cars, and wild deer (haha good luck).
Felsius

The symbol for degrees Felsius is an average of the Euro symbol (€) and the Greek lunate epsilon (ϵ).
Interferometry

It's important to note that while the effective size of the dog can be arbitrarily large, it's not any more of a good dog than the two original dogs.
The Moon and the Great Wall

And arguably sunspots, on rare occasions. But even if they count, it takes ideal conditions and you might hurt your eyes.
Emoji Sports

No horse has yet managed the elusive Quadruple Crown—winning the Kentucky Derby, the Preakness, the Belmont Stakes, and the Missouri Horse Hole.
Interstellar Asteroid

Every time we detect an asteroid from outside the Solar System, we should immediately launch a mission to fling one of our asteroids back in the direction it came from.
NEXUS

You also refuse to buy Cisco products because you hate the Thong Song, O. Henry, Deep Space Nine, freshwater whitefish, teenaged Incan emperors, Brak's brother, and vegetable-based shortening.
How to Make Friends

No, wait, come back! I want to be friends at you!
Temperature Preferences

There's a supposed Mark Twain quote, "The coldest winter I ever spent was a summer in San Francisco." It isn't really by Mark Twain, but I don't know who said it—I just know they've never been to McMurdo Station.
Nightmare Email Feature

"...just got back and didn't see your message until just now. Sorry! -- TIME THIS MESSAGE SAT HALF-FINISHED IN DRAFTS FOLDER: 3 days, 2 hours, 45 minutes."
Twitter Verification

When we started distributing special status tokens that signify which people are important enough to join an elite group, we never could have imagined we might be creating some problems down the line.
A �

If you want in on the fun, map a key on your keyboard to the sequence U+0041 U+0020 U+FFFD (or U+0021 U+0020 U+FFFD for the exclamation point version), and then no update can never take this away from you.
Thermostat

Your problem is so terrible, I worry that, if I help you, I risk drawing the attention of whatever god of technology inflicted it on you.
Defensive Profile

NO DRAMA ZONE -> If I've made you sad, you'd better not tell me, because I am TERRIFIED of that situation and have NO IDEA how to handle it.
Sky Spotters

Where I live, one of the most common categories of sky object without a weird obsessive spotting community is "lost birthday party balloons," so that might be a good choice—although you risk angering the marine wildlife people, and they have sharks.
Digital Resource Lifespan

I spent a long time thinking about how to design a system for long-term organization and storage of subject-specific informational resources without needing ongoing work from the experts who created them, only to realized I'd just reinvented libraries.
Credit Card Rewards

I should make a list of all the things I could be trying to optimize, prioritized by ... well, I guess there are a few different variables I could use. I'll create a spreadsheet ...
Immune System

It also helps with negotiation. "Look, if it were up to me, *I'd* accept your offer, but my swarm of autonomous killer cells literally can't be reasoned with. It's out of my hands!"
Making Progress

I started off with countless problems. But now I know, thanks to COUNT(), that I have "#REF! ERROR: Circular dependency detected" problems.
Cast Iron Pan

If you want to evenly space them, it's easiest to alternate between the Arctic and Antarctic. Some people just go to the Arctic twice, near the equinoxes so the visits are almost 6 months apart, but it's not the same.
Research Risks

The 1919 Great Boston Molasses Flood remained the deadliest confectionery containment accident until the Canadian Space Agency's 2031 orbital maple syrup delivery disaster.
Bun Trend

Our experts have characterized the ecological impact of this trend as "adorable."
State Borders

A schism between the pro-panhandle and anti-panhandle factions eventually led to war, but both sides spent too much time working on their flag designs to actually do much fighting.
Logical

It's like I've always said--people just need more common sense. But not the kind of common sense that lets them figure out that they're being condescended to by someone who thinks they're stupid, because then I'll be in trouble.
Jet Lag

I had some important research to do on proposed interstellar space missions, basketball statistics, canceled skyscrapers, and every article linked from "Women in warfare and the military in the 19th century."
Ears

My theory is that most humans have been colonized with alien mind-control slugs that hold the earbuds for them, and the ones who can't wear earbuds are the only surviving free ones.
October 2017

And yet I have no trouble believing that the start of the 2016 election was several decades ago.
Self Driving

"Crowdsourced steering" doesn't sound quite as appealing as "self driving."
Active Ingredients Only

Contains the active ingredients from all competing cold medicines, plus the medicines for headaches, arthritis, insomnia, indigestion, and more, because who wants THOSE things?
Worrying Scientist Interviews

They always try to explain that they're called 'solar physicists', but the reporters interrupt with "NEVER MIND THAT, TELL US WHAT'S WRONG WITH THE SUN!"
Real Estate

I tried converting the prices into pizzas, to put it in more familiar terms, and it just became a hard-to-think-about number of pizzas.
Thread

Since the current Twitter threadfall kicked off in early 2016, we can expect it to continue until the mid 2060s when the next Interval begins.
USB Cables

Tag yourself, I'm "frayed."
Obsolete Technology

And I can't believe some places still use fax machines. The electrical signals waste so much time going AROUND the Earth when neutrino beams can go straight through!
What to Bring

I always figured you should never bring a gun to a gun fight because then you'll be part of a gun fight.
xkcd Phone 6

We understand your privacy concerns; be assured that our phones will never store or transmit images of your face.
Still in Use

'Which one?' 'I dunno, it's your house. Just check each object.' 'Check it for *what*?' 'Whether it looks like it might have touched a paper towel at some point and then forgotten to let go.' '...' 'You can also Google to learn how to check which things are using which resources.' 'You know, I'll just leave the towel there and try again tomorrow.'
Two Down, One to Go

The third row will probably have to wait until 2034, and maybe longer. If I see a daytime supernova, I'll replace the meteor storm with that and consider it 3/3.
Typing Notifications

Over the years I've decided I'd rather have them on than not, but I'm glad there aren't "has opened a blank note to compose a reply to you" notifications.
Ensemble Model

I'm in talks with Netflix to produce an alternate-universe crime drama about the world where sliced bread was never re-legalized, but it's going slowly because they keep changing their phone numbers and the door lock codes at their headquarters.
Ringer Volume/Media Volume

Our new video ad campaign has our product's name shouted in the first 500 milliseconds, so we can reach the people in adjacent rooms while the viewer is still turning down the volume.
Supervillain Plan

Someday, some big historical event will happen during the DST changeover, and all the tick-tock articles chronicling how it unfolded will have to include a really annoying explanation next to their timelines.
Color Models

What if what *I* see as blue, *you* see as a slightly different blue because you're using Chrome instead of Firefox and despite a decade of messing with profiles we STILL can't get this right somehow.
Drone Training

The joke will be on him in a few weeks when animal control shows up and takes custody of his Roomba.
Eclipse Review

I watched from a beautiful nature reserve in central Missouri, and it was--without exaggeration--the coolest thing I've ever seen.
Eclipse Birds

'Hey! Put her down!' 'No, it's ok! The next chance for me to be carried to a blood cauldron isn't until 2024!'
Earth Orbital Diagram

You shouldn't look directly at a partial eclipse because of the damage that can be caused by improperly aligning the solar-lunar orbital plane with the orbital bones around your eye.