While browsing unpopular tags, I found that the tag delta has no description nor question using it. Some tags without questions are just synonyms, but this one seems to be unused.
Thus, I was wandering what subjects is was meant to. Is it the delta wing (in which case it should be synonym of the delta-wing tag) or delta airline, or something else. Given the ambiguity, the description must be updated (or the tag removed) but to do it I must understand what subject the tag was made for.