Just got this PDA and it's way more useful that I thought originally!
I wish I could have gotten a 2100 instead but I got this one for only 30£ so I immediately took it :D
Wow, nice! And still works!
Check out this MacWorld edition from 1993!
https://archive.org/details/MacWorld_9309_September_1993/page/n3/mode/1up
Note what Guy says about smartphones in the interview.