The Casio FX-850p Pocket Computer circa 1987, upgraded to 16k so that you can compute anything anywhere anytime! (portable week) : r/retrobattlestations
Casio FX-850P USB Interface | USB Interface for CASIO Pocket… | Flickr
Casio calculator FX-850p # 587 – Casio 880
Pocket Computer CASIO FX-850p (MUS 186) - YouTube
Casio - The FX-850p series - - Pocket computer - Casio The FX850p series - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA
Another calculator, Casio FX-850P - I still use it today : r/vintagecomputing