Regarding, re.
Abbreviation of "recursively enumerable"; the class of decision problems for which a 'yes' answer can be verified by a Turing machine in a finite amount of time.
In front of, according to a formal system of ordering items.
In store for, in the future of (someone).
At a higher or greater position than, in a ranking.
Under consideration, judgment, authority of (someone).
In the presence of.
In front of in space.
Earlier than (in time).
At an earlier time.
In advance.
At the front end.
Rather or sooner than.
In advance of the time when.