Personal Digital Assistant (PDA) device, "Casio Cassiopeia E-10 Pocket PC," 1998 - Museum of History and Industry - University of Washington Digital Collections
Retro Review: Casio Cassiopeia PV-S400 Plus PDA - YouTube
Casio Cassiopeia A-20E Review | Ashens - YouTube
Casio Cassiopeia - Wikiwand
CASIO CASSIOPEIA POCKET PERSONAL ORGANIZER PV-S400 PLUS 4MB PDA Planner 79767137984 | eBay