I have the main unit and power adapter.
type calculator
country Japan
year 1994
ram 24 Kb
graphic 128 x 64 mono LCD
colors mono
ports serial
batteries 4×”AA” alkaline + 1×”CR-2032″ Lithium
The OH-9700GE is an overhead display graphing calculator.
OH-9700GE näyttö toimii piirtoheittimen avulla, eli kankaalla näkyy mitä laskimella laskee :).
The Casio OH-9700GE — Graphic Calculator for Classrooms
The Casio OH-9700GE was a graphic scientific calculator with overhead projector compatibility — the ”OH” designation indicating a transparent display version designed for classroom presentation. Graphic calculators transformed mathematics education in the 1990s by making function visualisation and graph plotting accessible to every student. The OH version’s transparency allowed teachers to project calculations and graphs onto a screen for the entire class, making the OH-9700GE a genuine educational tool as well as a calculating instrument. Its large dot-matrix display could show mathematical graphs alongside standard calculation functions.