I like "servo", it sounds good.
Someday ago, Casey posted a thread (https://www.italki.com/discussion/203519) with an article(https://www.babbel.com/en/magazine/aussies-love-abbreviations) which was about abbreviation and how commonly they are being used. That's interesting though!
And I never heard of any of the abbr. mentioned by you. You guys are really good at cut-short any word to be more friendly:D