even a keyboardless PC in your pocket would have been hard to comprehend Given there were two pocket sized PCs released in 1989 - the Poqet PC and Atari Portfo

even a keyboardless PC in your pocket would have been hard to comprehend Given there were two pocket sized PCs released in 1989 - the Poqet PC and Atari Portfolio, that seems unlikely, except in a "the future is here but not evenly distributed" sense. "How would you use one without a keyboard?" "You'd touch the screen directly" "oh, ok". But even then, LCD pocket calculators were common by 1989. Wearable computing had been around since 1981 (Steve Mann) for anyone following tech developments. Seiko had released a wearable computer watch in 1984. In 1989 you didn't even have the internet, much less anyone purchasing things online But you had telephone ordering. And you could have had fax ordering. Back to the Future 2 came out in 1989 and they were predicting a future world of 2015, which included a kind of tablet computer, head mounted displays, flat-screens, implicit voice recognition[3]. OK it's not PCs, smartphones or the internet but it's enough that a blockbuster Hollywood movie expected people to understand "pay by putting your thumb on this portable device", and not find it "hard to comprehend". (Terminator was from 1984 and that was a mobile, keyboardless computer, in a sense). [1] https://en.wikipedia.org/wiki/Poqet_PC https://en.wikipedia.org/wiki/Poqet_PC [2] https://en.wikipedia.org/wiki/Atari_Portfolio https://en.wikipedia.org/wiki/Atari_Portfolio [3] https://en.wikipedia.org/wiki/Back_to_the_Future_Part_II#Depiction_of_the_future https://en.wikipedia.org/wiki/Back_to_the_Future_Part_II#Dep...