A player character, commonly abbreviated as PC, is a character controlled by a player, as opposed to a NPC, non-player character, which is controlled by the game system. The player is recongized by the name above his/her name along with squad name and has their screen usually facing the character that they made. Players can change the appearance, name and the weapon they are holding. The player can interact with other players and NPCs if they have a name above their heads. Once interaction between PCs have begun, a variety of actions become available; such as chatting, friend and squad invitations.