hmmm, I wouldn't really call those "Acronyms" so to say. They are a shortening of longer words, since loan words [wasei eigo] are just too dang long to say, ie ... makudonarudo = maku or makudo (McDonalds).
nairon is the way Japanese say nylon which is [wasei eigo] like all the words above. It doens't get shortened since it's short all ready.
hmmm ... interesting that you don't really see acronyms for Japanese words outside of company names.
Sorry NEC is based on English words so it's an English Acronym.
There are speical katakana dictionaries that cover only [wasei eigo] words since many older folks have trouble keeping up with all their meanings.
Tanaka Yasuo the governor of
Nagano Prefecture doesn't help either. He has added the wording "due process" to wonderful list of Jargon and loan words that Japanese need to know.
Loan words [wasei eido] are at times for the purist a heated debate since they add unnecessary vocabulary to the language but for those who highly detest such words forget themselves why such words do exist in the language.
I personally hate most of the words since I get a headache just trying to figure out which foreign (mostly English) word they are referring to.
Yet, as I started above, these words are also necesary at times because they indicate that it's a foreign idea ... "due process of the law" which is in a sense available in Japanese culture but yet not really since it depends on the person's compassion towards you, while "due process" specifically refers to law providing protection.
So, we are left to using a mouse instead of a nezumi.
Cheers