[onionisafruit]

I’m not OP, but I’ll answer the question for me. I think differently because I was taught differently in English class about 40 years ago. The wikipedia page makes a weak argument.

What do you think distinguishes an acronym from other abbreviations?

[xboxnolifes]

Acronyms and initialisms are formed by each of the first letters of a phrase. Acronyms are distinguished from initialisms by being pronounced as a word rather than saying each letter individually. Abbreviations are shortened words or phrases: apartment=apt., captain=cpt., corporation=corp., minute=min., etc.