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