In the years before smartphones, HP took a completely different take on mobile computing from Palm or Apple. They shrunk a whole #msdos Turbo XT #retropc to fit in the size of your hand. And people quietly bought them by the truckload. This blog post speculates why. https://dfarq.homeip.net/hp-200lx-and-related-palmtops/
@siliconundergro idk about "believe it or not" with the Atari Portfolio being quite famous from its appearance in Terminator? :D
@troed fair point, especially among Gen X. But I do think there's a segment of my readership that isn't aware of what Atari did after the 2600.