![BTGFederal on X: "Before Google Calendar and OneNote, there was the electronic organizer! This small calculator-sized computer served as a "digital diary" in the mid-#90s with functions like a calendar, address book, BTGFederal on X: "Before Google Calendar and OneNote, there was the electronic organizer! This small calculator-sized computer served as a "digital diary" in the mid-#90s with functions like a calendar, address book,](https://pbs.twimg.com/media/DqNiTvtWwAExtsU.jpg)
BTGFederal on X: "Before Google Calendar and OneNote, there was the electronic organizer! This small calculator-sized computer served as a "digital diary" in the mid-#90s with functions like a calendar, address book,
![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 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](https://casio.ledudu.com/images/calculs/casio/machines/C100.jpg)
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
![Pocket Digital Diary SF-4100 von CASIO, Electronic Organizer, 32kb, € 9,90 (83395 Freilassing) - willhaben Pocket Digital Diary SF-4100 von CASIO, Electronic Organizer, 32kb, € 9,90 (83395 Freilassing) - willhaben](https://cache.willhaben.at/mmo/8/711/789/758_1065407330.jpg)
Pocket Digital Diary SF-4100 von CASIO, Electronic Organizer, 32kb, € 9,90 (83395 Freilassing) - willhaben
![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 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](https://casio.ledudu.com/images/calculs/casio/machines/C310.jpg)