Typos

[librarian]

Perhaps, since the word is a contraction of 'typographical errors', it ought to be apostrophised - never really thought about it...

I don't believe so, because the apostrophe is only used in certain well-defined cases of contraction, mostly the elision of an unstressed vowel or syllable. I'm sure you've noticed this whene'er you've looked f'rit. There's the Scottish word unco', as an exception, but I can't think of any other ones.

And even in representing elided speech you're not allowed too many of 'em. You'd have pronounced the first three words of this sentence "you'd've", if you were reading it aloud, but you ca'n't have two such apostrophes in the same word---despite what Lewis Carroll thought.

I feel that if you have gone so far with use of an abbreviation that you have pluralised it, you have acknowledged that it has become a word in its own right and you should treat it as such. That is: you accept it when you decline it.