- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek IV: The Voyage Home
- Star Trek V: The Final Frontier
- Star Trek VI: The Undiscovered Country
- Star Trek Generations
Graviton force beam used by starships to manipulate objects outside the ship. Tractors are commonly used for towing other vessels and guiding shuttlecraft through landing and launches.