Gregory's ServerThe thing I didn't quite realize until I had the thing in my hands is that it is a _very_ full-featured PDA, with a _ton_ of useful software built into ROM, and a multitasking shell with convenient app-switching hotkeys. Everything you'd expect on a modern smartphone is there - calendar, alarms / reminders, TODO list, contact management, stopwatch...
And then there's a ton of stuff which is kind of above and beyond - spreadsheets (Quicken), finanical software (1-2-3), scientific graphing calculator, full customizable database, full serial terminal & laplink with modem support, _scheduled tasks_! You can write cronjobs that run batch files, and it will run in the middle of the night because the thing is always on and uses no power! This is a far better, more useful DOS machine than my desktop!