Just wanted to add a few foot notes concerning the vastly under rated plot line of Billion Dollar Brain. The character of Midwinter was actually based on H. L. Hunt, the Texas oil and ketchup king who ran his own international spy network (occasionally doing jobs on the side for the CIA), was insanely anti-Russian, and (according to the death bed claims of E. Howard Hunt) may have bank rolled the murder of JFK.
When the film was first released, many critics felt that the computer system was a sill sci-fi element. In reality, the US was already involved in the creation of the internet system. Since it was suppose to be top secret, it is a little surprisingly that they didn't utter a peep.
Virtually all American critics at the time took swipes at the film for it's intense anti-American statement. It was the Sixties, the Vietnam was still burning hot, and attacks on stupid war waging Texans seemed pretty cheap and easy. Today, after 7 years of George W. and Dick Cheney, the film almost looks like a news program.