- 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
Acronym for "Military Assault Command Operations,? a specially trained combat wing of the Earth military, apart from the Starfleet space service and its security officers. A unit of MACOs under Major Hayes is assigned to Captain Archer's NX-01 Enterprise for the Xindi mission, and enjoys a testy shipboard rivalry with Lieutenant Reed's security officers.