Oh, I misunderstood. When you said screen only, I was thinking an all-in-one, but sounds like you were meaning something more like a tablet.

You can get a mini computer and mount it to the VESA mounting point on the rear of a compatible monitor. Not quite screen only, but pretty close and has roughly the same footprint aside from a little extra cabling.

The book is wonderfully written, and actually fairly insightful from a disaster preparedness and policy standpoint. It’s been a while since a read it so forgive me if the details aren’t exactly correct. Its written from the viewpoint of a journalist traveling the world post zombie apocalypse. He is collecting stories from survivors of various major events that happened during the zombie outbreak. Each chapter details a different event conveyed by a different witness, so it’s not a cohesive single plot story. More like working notes of someone preparing to write a history of a major global disaster. It highlights some of the mistakes made and lessons learned as events unfolded.

Those might get mistaken for directional buttons. I had the same thought. Maybe I triangle with the point in the direction of the button, but you may run into the same issue.

I think to avoid that, it might be easiest to just show the four button layout with the correct button highlighted.