Dr. Harris' futuristic-looking car was actually a production car, unmodified at the time of filming - a Bricklin SV-1. The Bricklin was built in Canada but intended for the U.S. market, featuring high performance and a number of innovative safety features (in fact, the model number stood for "Safety Vehicle 1"). The SV-1 was the only production vehicle in automotive history to have powered gull-wing doors that opened and closed at the touch of a button (on other gull-wing cars, like the DeLorean it's often compared to, the doors must be opened and closed manually). Fewer than 3,000 were produced during its short run from 1974-1976, and it's estimated that fewer than 1,120 remain in existence.
The film was based on a very early novel by famed author Dean Koontz, published in 1973. "Demon Seed" was released to theaters in 1977. Much later, Koontz revised and updated the book, in a version released in 1997; it contains numerous technological updates and strong character differences from his original idea. As of 2016, Koontz' original novel version is not available either in print or in eBook formats.
In the 1997 re-write of the novel "Demon Seed," author Dean Koontz has Alex Harris bestowing the name "Adam Two" upon his supercomputer/A.I. intelligence system. However, the computer dislikes that name, and chooses to associate itself instead with the Greek mythological figures, Prometheus and Proteus. It believes that its purpose is to bring advanced knowledge to humanity (as the mythical Prometheus introduced humans to fire,) but finally chooses its own name, Proteus, as an homage to an entity which can change at will, to become anything which it wishes to be.
The movie was produced 10 years before the popular 3.5"HD Diskette was introduced, and the information loaded into the "Enviromod Security System" was via a 8" Floppy Disk (which had the potential of 6Mb of data).
Composer Jerry Fielding conceived and recorded several cues electronically, using the musique concrète sound world; some of this music he later reworked symphonically. This premiere release of the "Demon Seed" score features the entire orchestral score in stereo, as well as the unused electronic experiments performed by Ian Underwood (who would later be best known for his collaborations with James Horner) in mono and stereo.
The Harris' house's computer control panel in the kitchen during the scene where Alex gives his cook the strawberries is labeled "GUSTOSORT." From the Latin, this implies that the computer can choose between the tastes of the items stored in the kitchen's glass cabinets.
About 20 minutes into the film, Dr. Harris watches television while eating a meal. The television audio is from the third chapter of part three of Joseph Conrad's suspenseful 1915 novel, Victory: An Island Tale. The novel's central character, Heyst, who has renounced the world due to his ascetic upbringing, falls in love with Lena. He takes her away to his isolated island to live alone together, but others intrude on his plans - somewhat foreshadowing developments in the film.