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Re:Kazuo Kashio, a Founder of Casio Computer, Has Died by tsaoyu on Wednesday June 20, 2018 @07:41PM (#17360905)
I remember the fun time when I hacking into a CASIO fx-82ES. There is a unsolder jumper on PCB that can 'upgrade' 82ES to 991ES which has four more functions. http://www.instructables.com/id/Upgrade-your-Casio-fx-82es-i...

The quality of those calculators are amazing, thanks for creating all of those, R.I.P

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