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Free software has some glib naming conventions
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But the acronym totally destroys the understandability of the program name and instead is understood as "an unpleasant or stupid person" (https://dictionary.cambridge.org/dictionary/english/gimp).
If you look at similar commercial software you get names like MS Paint, Photoshop or Lightroom.
They should have stuck with "GNU Image", "GNU Photo" or maybe "GNU PhotoEdit".
When I teach old people how to use GIMP, we all laugh at the name, I explain what it stands for, and then they don't forget it.