Should LT have a postag for acronyms? (I will add ANOVA to spelling; the closest postag is NN:U.)
That might be a good idea - at least I wouldn’t mind.
Another -probably- good extension: a postag for punctuation marks (,;.:-_?!).
In German, there is the postag “PKT” for these non-word characters and I have used it quite often to write rules.
I like that idea.