The scenes with all of the computers at the military base were filmed in the backstage computer rooms at Walt Disney World's EPCOT Center.
(at around 50 mins) D.A.R.Y.L. stands for Data Analysing Robot Youth Lifeform, as shown on a screen in Dr Stewart's laboratory. Interestingly, the British spelling of the verb "analyze" is used.
(at around 14 mins) The video game that D.A.R.Y.L. plays is Pole Position (1982), most likely on an ATARI 600XL or 800XL platform.
(at around 1h 9 mins) Dr. Lamb says, "General, a machine becomes human when you can't tell the difference anymore." This summarizes the famous Turing Test, devised by Alan Turing, a founder of modern computer theory.
During development, the movie's plot and storyline were a closely guarded secret, including the meaning of the acronym "D.A.R.Y.L.".