I got a Microwriter AgendA from someone around the turn of the millennium, and I loved the chording system as an idea, especially for mobile input. I've reimple

I got a Microwriter AgendA from someone around the turn of the millennium, and I loved the chording system as an idea, especially for mobile input. I've reimplemented it once or twice using the down/right arrow keys and 4/8/6/return on the numpad of a typical keyboard, as a novelty. And I bought a CyKey, so both devices seen in this image in your link: https://en.wikipedia.org/wiki/File:MicroWriter,_AgendA,_and_CyKey.jpg https://en.wikipedia.org/wiki/File:MicroWriter,_AgendA,_and_... But it is enormously slow; it's approximately like typing with one slow finger, with writing being enough let alone punctuation. I'm most surprised nobody has made a HTML/JavaScript chording thing that works on multitouch tablets to be an overlay (maybe a bookmarklet?) to type into textboxes. So this Penti keyboard link is a great interest to me.