FIND is a mechanical verb. It is a method of letting a player know if a specific character, or list of characters, is currently logged into the game. The find verb is limited to a list of only nine characters at a time.
Find (not in game):
>find XXX There are no adventurers questing that match the names specified.
Find (in game):
>find XXX YYY Brave Adventurer Questing: XXX YYY