If you aren't obsessed with HP, and are looking for a calculator for
relatively trivial tasks encountered while PROGRAMMING, (not general
scientific needs), then the TI Programmer is probably the best suited
for the task.
There were two models of it:
The first one had LED display, and hardly any battery life.
The second one had LCD display, with incredibly long battery life,
and very short keyboard life.
But, the most CONVENIENT one of all, if your presbyopia hasn't gotten
too bad, is the Casio CFX-40 and CFX-400 ("scientific calculator"
wrist watch)
--
Grumpy Ol' Fred cisin(a)xenosoft.com