- Defictionalization: A fan made a wargames program for UNIX. It "simulates" the WOPR computer.
- Combined with Dr. Strangelove, Russia has a real automated system: the Perimeter system, also known as the Dead Hand. Officially, it is turned off in peacetime and only turned on in times of crisis, but is said to remain fully functional and able to serve its purpose whenever needed.
- Fake Russian: Vlada Vana, from Czechoslovakia, playing Ivan, the former Soviet astronaut.
- Genius Bonus: The guard's discussion in the beginning involves someone he knew who grew plants while chanting "om mani padme hum", which is a Sanskrit mantra also known as "the jewel of the lotus flower".
- Image Source: This film provides the page image for Ominous Multiple Screens.
- Throw It In: Word of God says Barry Corbin ad-libbed the line "I'd piss on a spark plug if I thought it'd do any good!"
- The jeep accident as David, Jennifer, and Falken ram through NORAD's front gate was unintentional; the jeep was meant to keep driving right to the base itself and not flip over. John Badham left it in and filmed a shot of the trio running the rest of the way to the base
- Unintentional Period Piece: The then-contemporary theme of Cold War nuclear panic definitely dates this film to before The Great Politics Mess-Up, as does its treatment of then-emerging computer technology (to early in The '80s). And of course there's the technology itself: dialing into remote systems with an acoustic-coupler modem looks positively quaint in the era of broadband internet, as do supercomputers with graphics that the most basic of modern PCs would put to shame (or even a computer of 1983). (The acoustic-coupler modem was already outdated in 1983. It was just there to be visually interesting.) The lax attitude to computer security is almost a textbook example of how not to do things these days, though to the irritation of IT people the world over, people still insist on writing down passwords to this day. And this being The '80s, there's the obligatory video arcade scene. Not to mention the way Lightman did his research on Professor Falken: going to the library, looking him up in the card catalog, reading books and microfilms; something that one can do today by typing it into Google.
- What Could Have Been: The original writer of the story said that he wanted Falken to be played by John Lennon, and Lennon was reportedly interested in the role. Alas, of course, one Mark David Chapman ensured that this would never come to pass.