Andre Engels wrote:
I don't agree that there should be an article on each such abbreviation; however, if there is no article, one should just write out the abbrevation in almost all cases. I tend to write out abbreviations like "etc.", "i.e." and "a.o." whenever they occur in an article I am editing.
This is a sensible position. I would tend to make such changes in most cases, but I would hope that eventually each of them does have an article on Wiktionary. Of the given examples, I tend to leave "kg" and "etc." alone, I have mixed feelings about "i.e." where most English speakers would understand "id est" even less, and I don't know what "a.o." means. I have to guess that it means "change it".
Eclecticology