Spies Like Us was a popular movie on Earth.
Lt. General Maurice Vidrine, Colonel Jack O'Neill and Major Samantha Carter greet each other by their ranks similar to the "doctor" scene from this movie. (SG1: "Tangent")
When SG-1 arrives at the outpost in Antarctica, Dr. Francine Michaels, Dr. Harold Osbourne, Dr. Norm Woods and Dr. Janet Fraiser all greet each other with doctor. (SG1: "Frozen")
Colonel Steven Caldwell, Colonel Abraham Ellis, Colonel Samantha Carter and Lt. Colonel John Sheppard all greet each other with "colonel". (SGA: "Be All My Sins Remember'd")