Here’s one of those annoying solecisms that drive me batty. You’ve probably seen it in an email:
Please revert to me. Or Please revert.
What the person means is "please respond to me" or "please get back to me". Unfortunately, revert does not carry the meaning of "please give me an answer". Revert means "to return to a previous state or condition". Or "to go back to a former period or subject". In legal terms, revert means "to return a property to its original owner". It has no connection with responding to an email or asking someone to come back to you with an answer.
In fact, by saying "please revert to me", you actually asking someone to transform back into you! Now who wants to do that. So when you're tempted to write "please revert" in an email, use "Please get back to me" instead.