Here is a scan of the OZ-590, along with a closed OZ-770...
The "gold standard" of all the Sharp Wizard units is the OZ-700 series.
Here is a scan of the OZ-590, along with a closed OZ-770...
One would think that the OZ-590, with 8MB of memory, or the OZ-800,
with 10MB of memory, would be more useful than the OZ-770, with only
3MB of memory. However it doesn't work that way. For example, memos
on the OZ-590 are limited in length to only 474 characters each. Memos
on the OZ-770 may be up to 2000 characters long, and there are very
useful E-book programs that work on the OZ-770.
Summary: If you are looking for an inexpensive PDA with lots of
flexibility, ease of use and a clear screen, by all means get a Sharp
OZ-770 Wizard Organizer. You can usually find one for less than
$100 on EBay. If you want a smaller Wizard, the OZ-800 is about the
same price as, and much superior to the OZ-590. I cannot recommend
the OZ-590. It is non-intuitive to use, and the screen is really hard to read.