A përs (abbreviated form of person) is a special ship flown by a special person in the game. The përs can have a special name, ship subtitle, weapon loadout, shield strength, picture, etc. The ATMOS developers and many Ambrosia Software developers have përs's. Also, all of the ships that give a mission when hailed or boarded, or have special names or hail the player with special quotes, are përs's. Many plug-in developers also like to include themselves as përs's in their plug-ins, and they usually they give themselves powerful starships and/or invincibility.