Which of the following is not an acronym?

Both acronyms and initialisms are made up of the first letter or letters of the words in a phrase. The word acronym typically applies when the resulting thing can be read as a word; for example, radar comes from "radio detection and ranging", which was coined in 1940 by the United States Navy, as an acronym for "Radio Detection And Ranging."

American computer scientist Steve Wilhite created the “graphics interchange format,” or gif, in 1987.

Laser is actually an acronym for "Light Amplification by Stimulated Emission of Radiation."

The word initialism only applies when the resulting thing is read as an abbreviation; for example DIY, which comes from "do it yourself," is pronounced by saying the names of the letters.

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