There is DM42 hardware[1] and the DB48X/C47 firmwares for it. I feel that they are very much pushing the boundary on what makes sense on a formfactor like that.

There is DM42 hardware[1] and the DB48X/C47 firmwares for it. I feel that they are very much pushing the boundary on what makes sense on a formfactor like that. For something more powerful, you'd probably want something more in the "cyberdeck" direction, with some 3d printing and cheap ARM linux boards it's relatively easy to build portable distraction-free compute device. I adore this Micro Journal device[2]. Although it's intended for writing, it's not too difficult to imagine it running some suitable calculator software. The keyboard could be easily adapted to HP Voyager (15c etc) style layout. [1] https://www.swissmicros.com/product/model-dm42n https://www.swissmicros.com/product/model-dm42n [2] https://liliputing.com/micro-journal-rev-2-revamp-is-a-compact-word-processor-with-a-mechanical-keyboard-and-a-clamshell-design/ https://liliputing.com/micro-journal-rev-2-revamp-is-a-compa...