Usage
General usage is straight forward and similar to the way most simple scientific calculators operate, but take note of the following special features:
Result Stack 	Each time you click on the = button or press your keyboard's Enter or = keys, the display result is written to 's result stack. You can navigate through the result stack with your keyboard's Up and Down arrow keys.
Percent Function 	 The percent function works somewhat differently to that on most calculators. However, once understood, its enhanced functionality proves quite useful. See the section about the percent function for further details.
Cut and Paste 	
Pressing the on 's display will place the displayed number on to the clipboard.
Pressing the right or on 's display will paste the clipboard content into the display if the content of the clipboard is a valid floating point number.
Statistical and Trigonometric Modes 	 can run in Statistical or Trigonometric mode. Pressing F3 will toggle between the modes or you can set the mode with the Configuration dialog brought up by pressing the Configure button or with F2.

Statistical Mode
In this mode the left column of buttons is allocated to statistical functions:
Buttons	Function
N	Recall the number of data items entered
Inv N	Display the sum of all data items entered
Mea	Display the mean of the data items entered
Inv Mea	Display the sum of the square of all data items entered
Std	Display the standard deviation (n)
Inv Std	Display the population standard deviation (n-1)
Med	Display the median
Dat	Enter a data item
Inv Dat	Clear last data item entered
Cst	Clear the store of all data item entered

Trigonometric Mode
In this mode the left column of buttons is allocated to trigonometric functions:
Buttons	Function
Hyp	Enter Hyperbolic sub mode. Hyp Sin for example is the hyperbolic sine: sinh(x)
Sin	Compute the sine
Inv Sin	Compute the inverse sine
Cos	Compute the cosine
Inv Cos	Compute the inverse cosine
Tan	Compute the tangent
Inv Tan	Compute the inverse tangent
Log	Compute the Log base 10
Inv Log	Compute 10 to the power of x
Ln	Compute the natural logarithm. That is the log to base e
Inv Ln	Compute e to the power of x

Single Key Accelerators
To simplify entering calculations from the keyboard has single key accelerators for most functions. For example entering 7R or 7r will calculate the reciprocal of 7 (1/7).
Key	Function	Notes
H	Hyp	Hyperbolic as in Hyp Sin, the sinh(x)
S	Sin
C	Cos
T	Tan
N	Ln	log base e
L	Log	log base 10
I	Inv	Inverse, ⪚ if you want arcsin(x) type i s
\	+/-	Change sign
[	x^2
^	x^y
!	x!	Factorial
<	Lsh	Left shift. Note: Inv Lsh is Right shift
&	And	Logical AND
*	X	Multiply
/	/	Divide
D	Dat	Enter data item in statistical mode
O	Or	Logical OR. Note: Inv Or is XOR
R	1/x	Reciprocal
=	=
Enter	=
Return	=
Page Up	C	Clear
Esc	C	Clear
Prior	C	Clear
Page Down	AC	Clear all
Next	AC	Clear all
Del	AC	Clear all
F1	?	Help, brings up this manual
F2	Configure	Bring up the configure dialog
F3		Switch between Trigonometric and Statistical modes