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2020 was the worst! COVID kept the museum closed for much of the year and a mains water pipe bursting causing a flood kept us closed for the rest.
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Casio OH-300ES

This Casio Scientific calculator emulates the FX-300ES, and has a projective screen.

It originally cost $129.99, designed to be placed on overhead projectors so teachers can see the calculation being input.

Our calculator is complete with its protective pouch, plastic case and instructions

Manufacturer: Casio
Date: 2012

Other Systems Related To Casio OH-300ES:

Item	Manufacturer	Date
Casio HR-110T	Casio	Unknown
Casio AL-2000 Programmable Calculator	Casio	1970
Casio 121-U Calculator	Casio	1973
Casio Personal-I (H802)	Casio	1976
Casio AL-10 Electronic Calculator	Casio	1976
Casio FX-110 Scientific Calculator	Casio	1977
Casio AQ-1000 Calculator	Casio	1978
Casio fx-180P	Casio	1980
Casio fx-310	Casio	1980
Casio FX-720P	Casio	1982
PsION	Casio	1982
Casio MG-777	Casio	1982
Casio PB-110	Casio	1983
Casio FX-910	Casio	1984
Casio Mini-Card MC-34	Casio	1985
Casio FX-750P	Casio	1985
Casio FX-7000G graphing calculator	Casio	October 1985
Casio FX-730P	Casio	1986
Casio FX-570	Casio	1986
Casio FX-850P	Casio	1987
Casio Digital Diary SF-4000	Casio	November 1988
Casio FT-21 Fortune Telling Calculator	Casio	November 1988
Casio FX-82L Fraction	Casio	1989
Casio FX-8500G calculator & FA-80 Interface	Casio	1989
Casio BOSS - Buisness Organising Scheduling System	Casio	1989
Casio fx-82SX	Casio	1996
Casio CFX-9850GC Plus Calculator	Casio	1996
Casio Digital Diary SF-4300A	Casio	1997
Casio fx-83MS	Casio	2000

This exhibit has a reference ID of CH47548. Please quote this reference ID in any communication with the Centre for Computing History.

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