One could go deeper, reading Kaplan and Schulte’s work side-by-side. For example, Kaplan writes that in 1983, “The first laptop computers had barely hit the market; public Internet providers wouldn’t exist for another few years. Yet [national security decision directive] NSDD-145 warned that these new machines — which government agencies and high-tech industries had started buying at a rapid clip — were ‘highly susceptible to interception.’” Schulte similarly frames her story in relation to the general populace’s experiences, or lack thereof, with personal computers and the internet at time. She writes on p. 489 of her Television and New Media article that, “Although home computer ownership surged in the late 1970s and early 1980s, modem use did not. As a result, in the early 1980s most Americans learned about the internet through popular culture, like WarGames, and news media outlets, before they experienced it personally.”
Go read this article where Meryl Alper very clearly outlines a culture of absent citations where popular work is concerned.