Mark Weiser once told me that Ubik was one of his inspirations for Ubiquitous Computing.

http://www.ubiq.com/hypertext/weiser/UbiHome.html

>Ubiquitous computing names the third wave in computing, just now beginning. First were mainframes, each shared by lots of people. Now we are in the personal computing era, person and machine staring uneasily at each other across the desktop. Next comes ubiquitous computing, or the age of calm technology, when technology recedes into the background of our lives. Alan Kay of Apple calls this "Third Paradigm" computing.

https://blog.canary.is/from-tesla-to-touchscreens-the-journe...

>One year earlier, in 1998, Mark Weiser described it a little differently, stating that, “Ubiquitous computing is roughly the opposite of virtual reality. Where virtual reality puts people inside a computer-generated world,” Weiser asserted,“ubiquitous computing forces the computer to live out here in the world with people.” This wasn’t the first time someone broached the idea of IoT. In the early 1980s, students at Carnegie Mellon’s Computer Science department created the first IoT Coke machine. Author Philip K. Dick wrote about the smart home in the 1969 sci-fi novel Ubik, and four decades before, inventor and engineer Nikola Tesla addressed the concept in Colliers Magazine. In an amazingly prescient 1926 interview, Tesla said,

>"When wireless is perfectly applied the whole earth will be converted into a huge brain…We shall be able to communicate with one another instantly, irrespective of distance…and the instruments through which we shall be able to do this will be amazingly simple compared with our present telephone. A man will be able to carry one in his vest pocket."

https://en.wikipedia.org/wiki/Ubik

“Five cents, please,” his front door said when he tried to open it. One thing, anyhow, hadn’t changed. The toll door had an innate stubbornness to it; probably it would hold out after everything else. After everything except it had long since reverted, perhaps in the whole city … if not the whole world.

He paid the door a nickel, hurried down the hall to the moving ramp which he had used only minutes ago.

[…]

“I don’t have any more nickels,” G. G. said. “I can’t get out.”

Glancing at Joe, then at G. G., Pat said, “Have one of mine.” She tossed G. G. a coin, which he caught, an expression of bewilderment on his face. The bewilderment then, by degrees, changed to aggrieved sullenness.

“You sure shot me down,” he said as he deposited the nickel in the door’s slot. “Both of you,” he muttered as the door closed after him. “I discovered her. This is really a cutthroat business, when —“ His voice faded out as the door clamped shut. There was, then, silence.

[…]

“I’ll go get my test equipment from the car,” Joe said, starting towards the door.

“Five cents, please,”

“Pay the door,” Hoe said to G. G. Ashwood.

[...]

“Can I borrow a couple of poscreds from you?” Joe said. “So I can eat breakfast?”

“Mr. Hammond warned me that you would try to borrow money from me. He informed me that he already provided you with sufficient funds to pay for your hotel room, plus a round of drinks, as well as —“

“Al based his estimate on the assumption that I would rent a more modest room than this."