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Retro tech: Using the PSION Series 5 in 2023
(andrewmelder.com)
This is a most excellent place for technology news and articles.
There was a modern handheld with this form factor maybe 8 years ago named the Gemini. It shipped with a version of Android, though could be flashed to run a Linux, if you didn’t mind not knowing if will wake up from sleep. I still have one sitting in the back of a drawer.