The Apple Newton MessagePad 2100 with the Newton Keyboard attached. Perhaps Apple will catch up with themselves one day soon.I used this set up extensively for some while for email, calendar and to-do items. I carried around an Apple LocalTalk kit as well with a LocalTalk to Ethernet adaptor. It all worked well but the Newton synchronisation software on the Mac was no end of trouble.
The drawing of a weary traveller was done on the MessagePad at the Singapore Airport.