Between NT and EOM why does being shorter make it more obvious, you'd need to look after whichever one you hadn't heard before. If anything I'd say EOM is easier to guess, due to its similarity with other acronyms: EOL (coding) EOP (business) where EO always stands for End Of.
I agree. I'd never guess what NT stood for. Even if I managed to deduce what it meant and how to use it by its usage patterns, I'd still not be able to guess. It reminds me of NB -- an acronym I learned how to use from context and even began using myself occasionally, only years later realizing I didn't actually know what it stood for.
EOM, on the other hand, is immediately clear to me because of it's similarity to EOL (end-of-line) and EOF (end-of-file).