Volleyball Over Time
- 1900: Net height was raised to 7 feet 6 inches
- 1900: Game length is made 21 points
- 1916: Game length is changed to 15 points
- 1960s: Various ways of making contact with the ball are discovered- spiking, bumping, blocking, diving, and rolling
- 1960: Women's volleyball's net height went down to 7 feet 4 inches
- 1982: A volleyball's pressure increases from 0.4 to 0.46 kg/cm²
- 1969: Backrow players are prohibited from blocking the volleyball
- 1974: Antennas are added to either side of volleyball nets (a ball may not go outside of the antennas)
- 1984: Players receiving a serve are prohibited from blocking the serve
- 1996: Ball is now allowed to touch any part of a player's body as opposed to beforehand, which limited contact to a player's arms
- 2001: A served ball is now allowed to touch the net before it goes over to its opponent's side