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More on the HP 35s Calculator

I have kept some notes as I was performing an stats operation on a list of numbers. Most of the time the interface on most calculators is intuitive enough that you don’t really need the manual to do things like stats or common operations on the scientific calculator. The Sharp calculator has data entry for stats refined to the point where you can return to any list member and correct the entry.

Stats on the HP35s is of the “old school” variety, with an important change: the calculator is always in single variable stats mode. Hitting the “Sigma+” key on the bottom of the keypad is enough to begin your entry, and this means you can interrupt your data entry at any point and to any other calculation that you need to do. This is true in both RPN and Algebra mode.

One annoying feature I found is that if you have a syntax error, there is no “clear error” or “clear” button that will instantly remedy it. All attempts to clear the display have to be done through a “clear” button that is made as a second function to the backspace key (the backspace key is the other way to clear your error, one character at a time, using the arrow keys to help you). To clear everything (“clear/all”) requires you to go through 2 layers of menus.

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