![Found this old gem today... Vintage Casio SF-4000 'digital diary' from 1988. Featuring a whole 31,902 characters of battery backed storage. : r/retrobattlestations Found this old gem today... Vintage Casio SF-4000 'digital diary' from 1988. Featuring a whole 31,902 characters of battery backed storage. : r/retrobattlestations](https://a.thumbs.redditmedia.com/WhZyH4dyh-bd_wLCTPz3uRZTg5ZT9ExiqgyovTDV-_4.jpg)
Found this old gem today... Vintage Casio SF-4000 'digital diary' from 1988. Featuring a whole 31,902 characters of battery backed storage. : r/retrobattlestations
Casio - SF-4000 - - Digital Diary - Casio SF4000 - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA
![Casio - SF-4000 - - Digital Diary - Casio SF4000 - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA Casio - SF-4000 - - Digital Diary - Casio SF4000 - 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/boites/zoom/SF4000_dos.jpg)
Casio - SF-4000 - - Digital Diary - Casio SF4000 - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA
![Casio - SF-4000 - - Digital Diary - Casio SF4000 - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA Casio - SF-4000 - - Digital Diary - Casio SF4000 - 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/boites/zoom/SF4000_2.jpg)
Casio - SF-4000 - - Digital Diary - Casio SF4000 - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA
![Casio SF-4000 Digital Diary Organizer, Mobile Phones & Gadgets, Mobile & Gadget Accessories, Other Mobile & Gadget Accessories on Carousell Casio SF-4000 Digital Diary Organizer, Mobile Phones & Gadgets, Mobile & Gadget Accessories, Other Mobile & Gadget Accessories on Carousell](https://media.karousell.com/media/photos/products/2016/08/28/casio_sf4000_digital_diary_organizer_1472369125_05a8b240.jpg)
Casio SF-4000 Digital Diary Organizer, Mobile Phones & Gadgets, Mobile & Gadget Accessories, Other Mobile & Gadget Accessories on Carousell
![The Casio SF-4000 ($109.95) is a "digital diary" with a large, six-line LCD screen that displays any full month… | Digital diary, Graphing calculator, Square roots The Casio SF-4000 ($109.95) is a "digital diary" with a large, six-line LCD screen that displays any full month… | Digital diary, Graphing calculator, Square roots](https://i.pinimg.com/736x/23/c0/ac/23c0ac2465458f146917410dedcd5549--square-roots-sf.jpg)
The Casio SF-4000 ($109.95) is a "digital diary" with a large, six-line LCD screen that displays any full month… | Digital diary, Graphing calculator, Square roots
![The Casio SF-4000 ($109.95) is a "digital diary" with a large, six-line LCD screen that displays any full month… | Digital diary, Graphing calculator, Square roots The Casio SF-4000 ($109.95) is a "digital diary" with a large, six-line LCD screen that displays any full month… | Digital diary, Graphing calculator, Square roots](https://i.pinimg.com/originals/23/c0/ac/23c0ac2465458f146917410dedcd5549.jpg)