IP65 and MIL-STD-80G fully rugged laptop I bought used online. Bought a bag strap at the thrift store and clipped it to the handle. Conveniently they even had one that was missing the bag I didn’t need. It fell off a few times on the concrete, (but that’s what MIL-STD-80G is for, along with all the door-frames I knew I’d run into with it), so I grabbed some spare wire I had laying around and tied it on better.
Duct taped a KBR1 to the side of it, along with a USB cap that I found laying in a parking lot so I have somewhere to tuck the loose cable from the wedge when I’m not using it. I log it using my flexDF2. It runs Debian.
I call it a “satcheltop.” It hangs from the shoulder strap with the keyboard at finger height, so I can flip it open and use it very conveniently whether sitting, standing, or walking slowly. The screen brightness adjusts so I can use it in bright sunlight or in the dark. The IP65 rating means I can use it in dusty environments and in the rain. It’s my daily driver now, my only PC currently. I’m typing this on it now.