How is it that English, that richest of all languages in descriptive vocabulary, does not have a command form for the guy that picks up the dishes from your table in restaurants. It is certainly rude to call out, "Oh, Busboy!" What other word works? They are not waiters and to call them such is inappropriate. However, call them we must. Any ideas?

I usually use "sir" when I am calling a male server or busboy, and "ma'am" when calling a female. I think that it's more polite then either "oh, waiter!" or "oh, busboy!" Plus, it eliminates the problem you face....