Words filled with meaning

Why you should never say "ATM machine"

Compared to other languages, English employs a relatively high number of acronyms and initialisms. According to linguists, this happens because English words tend to be short, and the word order is quite strict. While initialisms are easy to distinguish because they are not pronounced as a word, we don’t always recognize acronyms, especially when they refer to everyday things. Here are 11 popular acronyms and initialisms and their meaning.

When the scuba was invented in 1952 by Christian J. Lambertsen, it had a different name that, coincidentally, was also an acronym. Lambertsen had named his invention LARU, or ‘Lambertsen Amphibious Respiratory Unit’, but he changed it when it was time to apply for a patent. The name in the patent application was SCUBA, after ‘Self-Contained Underwater Breathing Apparatus’. Nowadays, scuba is a word of its own and has developed into words like scuba-diving.

In 1955, scientists who had developed a microwave radiation technology patented it as MASER or ‘Microwave Amplification by Stimulated Emission of Radiation’. A few years later, American physicist Gordon Gould developed a similar technology, this time using light instead of microwaves. Following the pattern of MASER, he registered it as LASER or ‘Light Amplification by Stimulated Emission of Radiation’. While the scientific community initially referred to this technology as the "optical maser", Gould’s acronym quickly became the preferred term.

If you’ve ever used the phrase "ATM machine", you need to know that you’re saying ‘machine’ twice. But don’t worry, this is a common error stemming from the fact that many people don’t know that ATM stands for ‘Automated Teller Machine’, a name that creates a parallelism between ATMs and bank tellers. Although the ATM was installed in 1967 in a London bank, no one really knows who was the first to call it ‘ATM’ instead of ‘cash-dispensing machine’.

The use of radio waves as a detection mechanism dates back to the late 19th century, but it was not properly developed until the 1920s, when the U.S. Navy started creating the first modern radars. By the Second World War, most military powers were using radio wave detection, but the technology did not have a name. In 1940, Lieutenant-Commanders Samuel M. Tucker and F. R. Furth of the U.S. Navy decided to come up with a code name and, after trying several phrases, landed on ‘Radio Detection And Ranging’, or RADAR.

If you are not familiar with the term CAPTCHA, you might recognize it as the test used by websites to make sure that you are human and not a robot. While clicking a box or selecting a picture is simple for a human, it’s extremely hard for a machine. What does the term CAPTCHA stand for? ‘Completely Automated Public Turing test to tell Computers and Humans Apart’. The name contains a reference to the Turing test —a method used to check if machines can behave like humans— and the acronym also functions as a portmanteau of ‘capture’ and ‘gotcha’.

If you follow international politics, you might have heard about NATO, a military alliance between several countries, the U.S. included. But have you ever wondered what NATO stands for? This alliance was established with the signing of the 1949 North Atlantic Treaty by several European and North American nations, and its name stands for ‘North Atlantic Treaty Organization’.

The discussions around GIF tend to focus on whether it’s pronounced "gif" or "jif", and one would think that the meaning of the acronym would shed some light on the matter, but it doesn’t. GIF stands for ‘Graphics Interchange Format’, a reference to its development to transfer compressed images across computers. While the ‘g’ in ‘graphic’ would suggest that the correct pronunciation is "gif", creator Steve Wilhite has stated that the acronym was modelled after the peanut butter brand Jif, and should be pronounced in the same way.

The BBC is one of the most famous broadcasters in the world, and its name is so iconic that it has evolved from an initialism to the official name for the company. Established in 1923 as the British Broadcasting Company, initialized as BBC, it became officially known as the BBC when the company transitioned from private to public. The BBC has become so connected with standard British culture that "BBC English" has been historically promoted as the standard speech for newscasters and network announcers.

Nowadays, we use the term CEO in corporate settings, but did you know that its origins are military and political? The first records of CEO as ‘Chief Executive Officer’ date back to legal and government texts from the 1780s, and the term is used in reference to leaders and state governors. However, the term would not become popular until the 1970s, when it was adopted by the corporate world for the highest-ranking person in a company.

When acronyms for an invention include a name, it’s often the name of its inventor. But sometimes, as it happened with the TASER, they include a name that has nothing to do with the person behind the invention. The TASER was developed by Jack Cover, but its acronym stands for ‘Tom A. Swift's Electric Rifle’. Who is Tom Swift? The protagonist of the 1911 science fiction novel_._ Cover added the ‘A’ initial to the name to make the acronym easier to pronounce.

When the U.S. Postal Service created its postal code system, also known as a ZIP code, they used an acronym for the name, but the meaning of the acronym was not really important. ZIP stands for ‘Zone Improvement Plan’, but this phrase doesn’t make complete sense. This is because the USPS was more interested in using the name ZIP to convey the idea that using postal codes would make deliveries faster and more efficient than what these letters stood for.

Slang on the tracks

Ten words railroaders invented that you still use to this day

Railroads changed America. They hauled manufactured goods, spare parts, mail, and millions of everyday folks across a country that used to take weeks to cross on foot or wagon. But railroading also built its own tight-knit culture, complete with its own slang. Take highball, the old signal for "all clear, full speed ahead," or caboose, that funny little car that used to trail every freight train. Both are still tossed around today, decades after steam gave way to diesel. Here are 10 more terms that show just how colorful railroad talk really was.

Around the late 1800s, American rail yards used a big wooden ball hoisted up a pole. When the ball was raised high, it meant the track ahead was clear, and the train could go full speed. Crews started saying "highball it," and the phrase stuck around long after those ball signals disappeared, replaced by colored lights.

Today, "highball" still means "go for it, full speed," even outside railroading.

This term goes back to 1800s American railroading. It described a worker riding a train without actually being on duty for that trip, just catching a ride to reach their next assignment. The term later jumped the rails entirely, showing up in airline talk ("deadhead flights") and everyday business slang for anything moved without generating revenue, like an empty return trip.

Nobody's totally sure where this one came from, but many word-history experts trace it back to a Dutch sailing term, "kombuis," meaning a ship's kitchen. Somehow, that crossed over into American railroading in the 1800s to describe the little car at the back of a freight train where the crew ate, slept, and kept watch.

Cabooses mostly vanished by the 1980s thanks to new tracking tech, but the word lives on in memory.

First recorded around 1918, this nickname described the crews who laid and maintained track by hand, before machines took over. Nobody agrees on where "gandy" came from—a popular but unproven story blames a Chicago tool company—but the "dancer" part makes sense: workers moved in rhythmic, coordinated steps, often guided by a caller singing out the beat, much like old work songs.

Old-time locomotives, especially the big freight-hauling kind, got nicknamed "hogs" by rail crews sometime in the 1800s. Naturally, the men who drove them became "hoggers," or sometimes "hogheads." It's a good-natured, slightly teasing nickname, the kind railroaders loved tossing at each other.

You'll still hear "hogger" used by old-timers and rail buffs today when talking about engineers.

This one didn't actually start on the railroad. It came from the 19th-century British military, where high-ranking officers wore caps trimmed in gold braid, or "brass." The nickname spread to American business and railroading by the early 1900s, where it became a common, half-joking way to refer to the company president or top bosses, the folks calling the shots from a comfortable office.

This newer term describes a railfan so excited about trains that they practically "foam at the mouth," snapping photos and chasing locomotives with total enthusiasm. Nobody agrees exactly how it started; some blame the foam scenery hobbyists use for model railroads, others say it's just about that over-the-top excitement.

First showing up in American newspapers around 1903 to 1905, a "shoofly" is a temporary track built to route trains around a blocked section, like a landslide or construction site. The name likely just comes from "shoo" plus "fly": basically waving traffic out of the way.

It's sometimes mixed up with the old molasses shoofly pie or a Civil War-era song of the same name, but there's no real evidence those are connected.

Despite the funny name, a frog has nothing to do with amphibians directly; it's the X-shaped metal piece at a track junction that lets train wheels cross from one rail to another. Railroaders started using the term in the 1800s, likely because the casting's shape reminded someone of a frog's splayed legs.

Railroaders took the everyday verb "to consist of" and flipped it into a noun sometime in the 1900s. A train's "consist" is simply its lineup: how many locomotives, freight cars, or passenger cars are hooked together, and in what order. It's a small grammatical trick, but it's stuck around as standard railroad shorthand ever since.