I think the video is too dismissive of the HP200LX. I still have one of these and it was a truly amazing thing to use. It was powered by a clockless 80C86 pro

I think the video is too dismissive of the HP200LX. I still have one of these and it was a truly amazing thing to use. It was powered by a clockless 80C86 processor and lasted for 40 hours on just 2 AA batteries. Most of the in-built applications (e.g. Quicken and Lotus 1-2-3) ran directly from ROM rather than being copied into RAM and then executed. That meant when you pressed the button to switch to that program it was available instantly. Quite frankly, compared to the HP 200LX our replacement handheld device (mobile phone) is actually a backward step.