Use regex for regular expressions (some people even use regexpr)

Looks like the title has been amended

Nobody in tech thinks RE stands for regular expression...

Search Google for "re documentation" and look at some of the results.

Google is effectively aliasing RE to regular expression. None of the links use "RE" as an acronym. Regex/Regexp has always been the accepted acronym.

They do though. RE is a python library, an Erlang library, there's a reference to perlre, clojure calls it re, etc. Then there's the C lib pcre.

Also Google chooses to alias certain things for a reason.