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About go21

HP 21 hardware calculator emulator
This is the first member of the woodstock family

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Love the hp21

V Pink

Well done! Not obvious is that you need to touch the list/menu button to setup Euro vs NA mode and to enable Display+ that shows Deg vs Rad

ksb s

Just like my first HP calculator over 40 years ago.

A Google user

Just like using the real thing!

Aziz Yacoub

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