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 HP41C 
^ 
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 X^{Y}. 
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 HP41C.)  
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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