1991 DD-1
The DD-1 is a portable device that supports data display via optical disc rather than music playback.
If you find it useful, you can support it. Support the archive
The DD-S35 is a portable device that supports data display using 8cm discs. It features a display and an input keyboard and supports dedicated content such as dictionaries and books. It is powered by AA batteries. It does not support audio playback and is designed for data reference. It is a derivative model adapted for optical disc-based information use.