The NORAD command center built for the movie was the most expensive set ever constructed up to that time, built at the cost of one million dollars. The producers were not allowed into the actual NORAD command center, so they had to imagine what it was like. In the DVD commentary, director John Badham notes that the actual NORAD command center isn't nearly as elaborate as the one in the movie; he refers to the movie set as "NORAD's wet dream of itself."
NORAD HQ set was built in the Cascades, the "Oregon" airport was really Boeing Field, "Goose Island" is really Anderson Island in the southern part of Puget Sound (all in Washington). The last ferry off the island really is at 6:30, and you really are stuck there if you miss it.
During their extensive research for the film, writers Lawrence Lasker and Walter F. Parkes made friends with many 'hackers' and security experts. They later wrote Sneakers another film featuring 'hackers' and security experts.
According to John Badham, the scene of the jeep trying to crash through the gate at NORAD and turning over was an actual accident. The jeep was supposed to continue through the gate. They added the scene of the characters running from the jeep and down the tunnel and used the botched jeep stunt.
The dual 8-inch floppy drive is an IMSAI FDC-2, the monitor is a 17-inch Electrohome, the keyboard is an IMSAI IKB-1, and the 1200 baud modem (on top of the monitor) is a Cermetek 212A relabeled with the name "IMSAI". The acoustic coupler prop was added for visual effect only.
The writers' main inspiration for the character of Professor Stephen Falken was Cambridge Professor Stephen Hawking. Hawking was originally approached to appear in the movie, but he declined because he didn't want the producers exploiting his disability.
When the message for the tour group in NORAD is activated, the sound effect that plays is actually used in the video game Galaga, and can also be heard if you listen carefully when David is playing it in the beginning of the movie.
First cinematic reference to a "firewall" - a security measure used in computer networking and Internet security. This does not predate the existence of the Internet, however, which is considered to have started in 1969.
The computer in David's room is actually an IMSAI 8080. The person who supplied the computer for the film tells how Matthew Broderick saved a shooting day by figuring out a programming sequence for the keyboard on his own after instructions were lost.
The WOPR, as seen in the movie, was made of wood and painted with a metal-finish paint. As the crew filmed the displays of the WOPR, Special Effects Supervisor Michael L. Fink sat inside and entered information into an Apple II computer that drove the countdown display.
The touch-tone sequence to reach the President from NORAD control center (approx 44 minutes in) is the famous "da da da dum" from Beethoven's Fifth Symphony. These four notes are also the letter V in Morse Code, used variously as a symbol of victory and peace.
The tunnel and exterior used for the entrance into NORAD (Griffith Park) is the same tunnel used in the climax of "Back to the Future Part II" as well as the tunnel to enter and exit Toontown in "Who Framed Roger Rabbit".
A video game version of this movie was made in 1984 for the ColecoVision, Commodore 64 and Atari 8-Bit Computer. The game started out greeting you as Professor Falken and you would play a game of Global Thermonuclear War. Your objective was to stop nuclear war from occurring by protecting the country with various military vehicles and weapons in a set time limit without reaching Defcon 1.
Martin Brest was fired as director a short while into production due to creative differences. He has stated that he took NORAD'S control center layout and did a scaled down version of it for "Beverly Hills Cop"'s police control center.
Graphics on the large NORAD war room screens were rendered in advance by an HP 9845C desktop computer running BASIC. In 1982 the 9845C was comprised of a base with built-in keyboard and a 14" color monitor that mounted on top. Cost of a 9845C was about $90,000 (inflation-adjusted) and the entire "desktop" computer weighed about 100 pounds. The computer's resolution was not good enough to project on a large screen or to be filmed from directly, so a high-resolution monochromatic display was connected. The images were filmed from the display, one frame at a time, one color at a time, using filters for red, green, and blue. The process took about 1 minute per frame of film.
The computer display showing "Game Time Elapsed" and "Game Time Remaining" is framed in a bezel with stenciled labels reading "GST", "TEP", "SIM", and "TTG". These are standard acronyms used with electronic, and other, test equipment. Respectively, they stand for Ground System Test, Test Evaluation Plan, Scientific Instrumentation Module, and Time To Go.
The infirmary door lock keypad has 16 buttons. With a six-digit code as audibly signified as using only two of those buttons, each pressed three times in succession, there would be only 120 possible combinations. Adding the restriction that they be adjacent to each other, there would be only 24 possible combinations for David to try, and only 12 if they were known to be adjacent horizontally.
The NORAD Computer System (NCS) used 1950's-era systems in 1983. After WarGames, visitors for the NORAD tour constantly asked to see the modern computer rooms. Partly driven by this, in coming years color displays (mostly on Sun workstations) started replacing the much older equipment. Incidentally, NORAD only detected threats. Strategic Air Command, until 1992, handled responses to threats.
This is an non-exhaustive list of the possible war scenarios run by Joshua in Global Thermonuclear War: U.S. First Strike, USSR First Strike, NATO/Warsaw Pact, Far East Strategy, US USSR Escalation, Middle East War, USSR China Attack, India Pakistan War, Mediterranean War, HongKong Variant, SEATO Decapitating, Cuban Provocation, Atlantic Heavy, Cuban Paramilitary, Nicaraguan Preemptive, Pacific Territorial, Burmese Theaterwide, Turkish Decoy, Angentina Escalation (possible misspelling of "Argentina Escalation"), Iceland Maximum, Arabian Theaterwide, U.S. Subversion, Australian Maneuver, Sudan Surprise, NATO Territorial, Zaire Alliance, Iceland Incident, English Escalation, Middle East Heavy, Mexican Takeover, Chad Alert (repeated twice), Saudi Maneuver, African Territorial, Ethiopian Escalation, Turkish Heavy, NATO Incursion, U.S. Defense, Cambodian Heavy, Pact Medium, Arctic Minimal, Mexican Domestic, Taiwan Theaterwide, Pacific Maneuver, Portugal Revolution, Albanian Decoy, Palistinian Local (possible misspelling of "Palestinian Local"), Moroccan Minimal, Czech Option, French Alliance, Arabian Clandestine, Gabon Rebellion, Northern Maximum, SEATO Takeover, Hawaiian Escalation, Iranian Maneuver, NATO Containment, Swiss Incident, Cuban Minimal, Iceland Escalation, Vietnamese Retaliatio (possible truncated name for "Vietnamese Retaliation"), Syrian Provocation, Libyan Local, Gabon Takeover, Romanian War, Middle East Offensive, Denmark Massive, Chile Confrontation, S.African Subversion, USSR Alert, Nicaraguan Thrust, Greenland Domestic, Iceland Heavy, Kenya Option, Pacific Defense, Uganda Maximum, Thai Subversion, Romanian Strike, Pakistan Sovereignty, Afghan Misdirection, Thai Variation, Northern Territorial, Polish Paramilitary, S.African Offensive, Panama Misdirection, Scandinavian Domestic, Jordan Preemptive, English Trust, Burmese Maneuver, Spain Counter, Arabian Offensive, Chad Interdiction, Taiwan Misdirection, Bangladesh Theaterwid (possible truncated name for "Bangladesh Theaterwide"), Ethiopian Local, Italian Takeover, Vietnamese Incident, English Preemptive, Denmark Alternate, Thai Confrontation, Taiwan Surprise, Brazilian Strike, Venezuela Sudden, Maylasian Alert (possible misspelling of "Malaysian Alert"), Isreal Discretionary (possible misspelling of "Israel Discretionary"), Libyan Action, Palistinian Tactical (possible misspelling of "Palestinian Tactical"), NATO Alternate, Cypress Maneuver, Egypt Misdirection, Bangladesh Thrust, Kenya Defense, Bangladesh Containmen (possible truncated name for "Bangladesh Containment"), Vietnamese Strike, Albanian Containment, Gabon Surprise, Iraq Sovereignty, Vietnamese Sudden, Lebanon Interdiction, Taiwan Domestic, Algerian Sovereignty, Arabian Strike, Atlantic Sudden, Mongolian Thrust, Polish Decoy, Alaskan Discretionary, Canadian Thrust, Arabian Light, S.African Domestic, Tunisian Incident, Maylasian Maneuver (possible misspelling of "Malaysian Maneuver"), Jamaica Decoy, Maylasian Minimal (possible misspelling of "Malaysian Minimal"), Russian Sovereignty, Chad Option, Bangladesh War, Burmese Containment, Asian Theaterwide, Bulgarian Clandestine, Greenland Incursion, Egypt Surgical, Czech Heavy, Taiwan Confrontation, Greenland Maximum, Uganda Offensive and Caspian Defense.
When David is having his computer dial random phone numbers in his search for Protovision, the telephone numbers listed on the screen are not of the traditional fake "555" variety. This isn't a problem since the area code is "311". This particular area code number does not exist and will never be used as a real telephone number. This number was set aside by AT&T years ago for special purposes as was the case of "411" and "911".
The computer seen in the black and white film of Falken is made up from components of an IBM AN/FSQ-7 Combat Direction Central, built in 1954 to protect the US from Soviet bomber attack. It was the largest and heaviest computer system ever built, the full system weighing 6000 tons and taking up an entire floor of a bomb-proof blockhouse. Components of decommissioned systems were sold for scrap and bought by film and television production companies who wanted futuristic looking computers, despite the fact they were built in the 1950s. The components used in this film were previously used in 'The Time Tunnel (1966)' and 'The Towering Inferno (1974)' amongst many others.
When David makes a joke directed at his teacher about asexual reproduction the laughter heard afterwards is considered to be the rest of the kids in the classroom. But John Badham (director) said that some of the crew didn't know the punch line and laughed out loud during the scene. That laughter was left in the sound track, and if you listen closely you will hear what is clearly adults laughing out loud, rather than classroom sniggering.
When Falken starts the film for David and Jennifer, he uses the phrase "Are you sitting comfortably? Then I'll begin." This was the opening line from Listen with Mother, BBC radio program for children which ran between 1950 and 1982. It is likely that Falken's son Joshua would have listened to this program.
The movie is featured as a central plot device in the book "Ready Player One" by Ernest Cline. The protagonist must re-enact the movie playing the part of David, line by line, movement by movement in order to unlock a door.
In the first scene, Jerry mentions the phrase "Om mani padme hum," an ancient Sanskrit mantra. The six syllables remind the speaker of the six Buddhist perfections: generosity, ethics, patience, diligence, renunciation, and wisdom.
At the start of the first NORAD Command Center scene, many large white springs are visible on the floor. These are the set designer's concept of seismic base isolation springs, which are a common means of protecting structures from earthquake damage. In the case of the underground NORAD bunker, the springs would isolate some kind of foundation platform from the cave floor.
The main NORAD Command Center is located at Peterson Air Force Base in Colorado Springs, Colorado. The underground facility portrayed in the film is the Alternate Command Center, which is located in a nuclear bunker deep within the nearby Cheyenne Mountain.
Since 1989, NORAD's operations have expanded to include tracking small aircraft entering and operating within U.S. and Canadian airspace. The purpose of such tracking is to aid in counter-drug operations.
Since 2006, the NORAD Alternate Command Center in Cheyenne Mountain has operated in a reduced "warm standby" mode. Day-to-day operations have been consolidated in the main Peterson Air Force Base NORAD Command Center.
Crosby, Stills, and Nash submitted a song for the soundtrack called "Wargames", (that was originally from their "Allies" album) but was edited out of the film at the last second. However, United Artists still used the video for the song, featuring footage for the film, as a promotion video that did receive airplay on MTV.