
Running the Calendar function

Profile view

Unfolded

Top and back sides

Main card with the Sharp custom all-in-one controller and 2 x 128 KB Toshiba memory chips,
Display card with the display controller located behind the LCD display.

Carefully taken apart. This kind of 2-card organizer is not easy to open.

YO-550, same model but includes the American Heritage Dictionary.
User manual
To donate your old devices and give them a second life in this collection and this web site - please send us an e-mail to pdaorga@gmail.com