This book has never been used. I always held on to my trusted HP15c and never got around to buying a HP42S,

The HP42S was meant as a replacement for the HP15c, with two display lines and more overall power. It is stacked with easy to access menu's to avoid the need for more keys and thus cluttering the keypad with an overload of key mnemonics.

This is not the owners manual but an in-depth review of how to get the most out of the HP42S.

It comes as new. See pictures.

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