Source with more (not-so-cassette-futuristic) images: Traveller Art by Arne Niklas Jansson (AndroidArts)
Traveller is an old science-fiction roleplaying game released soon after D&D (...). Initially it was more of a generic rule system without much in the way of illustrations, but over the years a vast fleshed outsetting was developed for it, and the lore now covers multiple time periods which means you'll have to pick a time period to play, weighing what bits you like or feel were a lore mistake.
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Traveller Communicator based on the one in the Grand Census supplement. Unsure what the second screen is. Maybe readable monochrome, for displaying settings and such. Or a persistent e-paper display? Slide-out top screen could be used for Augmented Reality HUD stuff as it's clear. The device is probably about the size of the original Game Boy. Nowadays we wouldn't design a clunky device like this, with specialized tactile knobs and stuff. But it might make sense in the field.
Artist's Mastodon. https://mastodon.gamedev.place/@androidarts
