![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/machines/zoom/SF4000.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
![The Casio SF-4000 ($109.95) is a "digital diary" with a large, six-line LCD screen that displays any full month… | Digital diary, Square roots, Graphing calculator The Casio SF-4000 ($109.95) is a "digital diary" with a large, six-line LCD screen that displays any full month… | Digital diary, Square roots, Graphing calculator](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, Square roots, Graphing calculator
![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://preview.redd.it/found-this-old-gem-today-vintage-casio-sf-4000-digital-v0-ffx7e5b5p2h81.jpg?auto=webp&s=d899079dde2f68f42c20f18d0033ffc2cf936f19)
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
![agenda antigua casio digital diary sf-4000 - Buy Other technical and scientific antiques on todocoleccion agenda antigua casio digital diary sf-4000 - Buy Other technical and scientific antiques on todocoleccion](https://cloud10.todocoleccion.online/antiguedades-tecnicas/tc/2014/11/03/20/46026409.jpg)