The Museum of HP Calculators


Text to HP Key translations

Some calculator keys can't easily be represented in text. This table translates the strings used in the programs here into HP keytops.
ASCII Key Code Typical Key Meaning
->

Used wherever a calculator would use a right arrow key conversions
÷

Division. This should be obvious but some browsers display the ÷ code as /
/

Division. Used on later calculators that print a / in the listings for division such as the HP-41C
^

etc.

Used wherever a listing would show an upward pointing arrow or a caret.  (i.e. can be used in both R^ for roll up and X^Y for XY.  
|-

Alpha Enter

The alpha append symbol on the 42S. In program mode press Alpha and then Enter. (Press Shift K in alpha mode on the HP-41C.)
delta

Change in. Typically followed by % or days
integrate

Integration
mean x

Mean of x values
pi

The constant 3.14159...
roll dn

Roll the stack down
roll up

Roll the stack up
sqrt

Square root of X
sum

Sum symbol
sum+

Sum add
sum-

Sum subtract
x!=y or x!=0

x not equal to y (or 0) test
x<>y

exchange x and y
x<>I

exchange x and I

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