Organized basketball is a game played by five players per team. Historically, these players have been assigned to positions defined by the role they play on the court, from a strategic point of view. Broadly speaking, the three main positions are guard, forward, and center, with the standard team featuring two guards, two forwards, and a center. Over time, as more specialized roles developed, each of the guards and forwards came to be differentiated, and today each of the five positions are known by unique names, each of which has also been assigned a number: point guard (PG) or 1, the shooting guard (SG) or 2, the small forward (SF) or 3, the power forward (PF) or 4, and the center (C) or 5.