Superman The "S" on superman's suit stands for super...because his name is Superman and he is super.
Superman isn't real.
13 cards in a suit
it s a secreat
Scientist, Because his father was a scientist
Supermans tights are red.
It's his families crest. It doesn't stand officially for anything, it is the family crest for The House of El. As in his father Jor El and Supermans real name Kal El. But once on earth as Superman it also got adopted as S for Superman, so the crest had some part in how he got his hero name.
If by thing you mean object I would say 'Zoot suit' a kind of suit most popular during the the late 30's and early 40's.