Introduced on July 1, 1977, this was an HP never seen
before: an adding machine and without RPN logic! The
only interesting option was a switch that allowed the user
to select to view the results on paper, or on display. It
failed to attract any interest, so it is today rather rare.
Code name: KISS (Keep It Simple Stupid). Original price: $175
Introduced on September 1, 1977, this was the same model as
the HP 29C, but with a built-in printer. Even the code names
were related: Bonnie (HP 29C) & Clyde (HP 19C).
However, the battery back was completely different to
accommodate the increased power requirements of the printer.
Code name: Clyde. Original price: $345
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Click on the
for a picture of the manual's front cover.