The Most Powerfull Technology In all Sport 

1 ] Assisting the Umpires / Referees -  replay And Other Video Replay Reference 

2] Hawk-Eye Technology -  Hawk-Eye ball tracking system.

use in mostly

1] Tennies 

2 ] Soccer / Football

3 ] Basketball

4 ] Cricket

5 ] Aussie Rules Football


6 ] Baseball

7] Cross-Country Skiing

8] Rugby Union

9] Rugby League