VINTAGE CASIO SF-4600B Digital Diary Pocket Electronic Organizer 64kb - £19.20 | PicClick UK
Lot of 2 Casio (FX-795P Personal Computer and Digital Diary) & 1 Sharp Organizer | #1692745024
Casio - Organizers for kids - - Digital Diary - Casio Organizers for kids - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA
File:Casio digital diary SF-3300A 32KB (1).jpg - Wikimedia Commons
Casio SF-4300A Digital Diary Pocket Electronic Organizer | eBay
The Casio Secret Sender was the original messaging gadget