Week 1️⃣ 5️⃣

Acronyms and initialisms are part of everyday English, and they are easy to confuse. Both are made from the first letters of longer names, but acronyms are spoken as words, while initialisms are spoken letter by letter.

Science has given us some of the clearest examples. SCUBA began as Self-Contained Underwater Breathing Apparatus, while RADAR means Radio Detection and Ranging, and LASER stands for Light Amplification by Stimulated Emission of Radiation. All three started as specialised scientific terms but are now everyday words.

Global organisations rely on acronyms too. UNESCO, UNICEF, UEFA, and FIFA are all spoken as words and recognised worldwide. Space exploration added its own: NASA, the National Aeronautics and Space Administration, deliberately designed to be short and memorable.

CAPTCHA, the puzzle that asks you to identify traffic lights or type distorted letters to prove you are human, stands for Completely Automated Public Turing test to tell Computers and Humans Apart. It's one of the most convoluted acronyms in everyday use, and one that most people encounter daily without ever knowing what it means.

Initialisms, by contrast, stay as letters. The BBC is the British Broadcasting Corporation and MTV, or Music Television dominated the television economy in the 1990s. ITV means Independent Television in the UK, but the same three letters in Spain refer to a vehicle inspection, the equivalent of the British M.O.T. test, which stands for Ministry of Transport. People always say the individual letters, never "mot", despite the fact it could be pronounced as an ancronym.

Some names evolve in unexpected ways. The military vehicle now called the Jeep was originally designated G.P. for General Purpose. The soldiers quickly abbreviated "gee-pee" into "jeep," the nickname stuck, and after the war it became a global brand.

Finally, there is the idea of the backronym, when a word exists first and people later invent a phrase to fit the letters. The APGAR score, used to check the health of newborn babies, was named after Dr Virginia Apgar, but teachers later turned it into Appearance, Pulse, Grimace, Activity and Respiration, so students could remember it more easily.