Use the following links to jump to a table for a particular menu:
The operations described below do not appear within a menu. Instead, they are accessible from a button, either on the left or right page. The operation itself will describe what button to press to get this operation.
Operation  Description 

% 
This operation takes two real arguments, calculates the product of them and divides that product by 100. 
%CH 
Given real values x and y pushed onto the stack in that order, this operation calculates 100 * (y  x) / x. Note... 
+ 
The add operation will take its two numerical operands and produce the sum as its result. It operates on reals,... 
 
The subtract operation will take its two numerical operands and produce the difference as its result. It operates... 
< 
This operation takes two real, integer or string values and produces a 1 if the first value is less than the second... 
= 
This operation always produces an expression which describes a relationship between its left and right side. Unlike... 
> 
This operation takes two real, integer or string values and produces a 1 if the first value is greater than the... 
CLEAR 
This operation removes all items from the stack, leaving an empty stack. 
CONT 
The CONT operation will resume a HALTed program. By placing a HALT in your program... 
CONVERT 
This operation performs a unit conversion of the value in Real_{1} from the unit described by Symbol_{2... } 
DROP 
This operation removes the item from the top of the stack. 
EVAL 
This operation takes an item from the stack and evaluates it. For most types of stack items, evaluation does not... 
INV 
This operation takes a real of complex value and produces its inverse. The inverse is one divided by the input... 
LAST 
This operation takes no arguments from the stack. Instead, it pushes onto the stack the last arguments used in the... 
PURGE 
This operation is used to remove a symbol from the symbol table, deleting the value associated with it. The... 
RCL 
This operation is used to get the value of a symbol. It takes a symbol from the top of the stack and pushes the... 
ROLL 
This operation takes a real number from the stack which is the number of items on the stack to roll down. That... 
SQ 
The SQ operation multiplies its input argument by itself to produce the square of that input value. The value can... 
STO 
This operation is used to store an item on the stack into a named symbol. Anything which can be put onto the stack... 
SWAP 
This operation pops the top two items off of the stack and pushes them back on in reverse order. 
^ 
This operation calculates x^{y} given that values x and y are pushed onto the stack in that order. Either... 
× 
The multiply operation will take its two numerical operands and produce the product as its result. It operates on... 
÷ 
The divide operation will take its two numerical operands and produce the quotient as its result. It operates on... 
→ 
This operation can only be used from within program context. In that context, it is used like this: ... 
→NUM 
This operation takes an item from the stack and evaluates it. For most types of stack items, evaluation does not... 
∂/∂x 
This operation determines the derivative of the expression... 
√ 
This operation takes a real or complex value and finds its square root. The positive root is return for real values... 
∫ 
This operation can be used to determine the symbolic or numeric integral of the input expression or program. For... 
≠ 
This operation produces a 1 if the two arguments are not equal, a 0 otherwise. It can operate on real, complex,... 
≤ 
This operation takes two real, integer or string values and produces a 1 if the first value is less than or equal to... 
≥ 
This operation takes two real, integer or string values and produces a 1 if the first value is greater than or equal... 
Operation  Description 

CMD 
This operation enables or disables the Command functionality on the calculator which allows you to recall recently... 
DEG 
This operation puts the calculator in degree mode. What this means is that any other operations which operates on... 
ENG 
This operation enables the engineering format for real numbers on the calculator. The engineering format takes a... 
FIX 
This operation enables the fixed format for real numbers on the calculator. The fixed format takes a real argument... 
LAST 
This operation enables or disables the ■Last functionality on the calculator. The... 
ML 
This operation enables or disables multiline display for the item at the bottom of the stack. When disabled, the... 
RAD 
This operation puts the calculator in radians mode. What this means is that any other operations which operates on... 
RDX, 
This operation switches between the "." and the "," character to represent the radix point in numerical output. By... 
SCI 
This operation enables the scientific format for real numbers on the calculator. The scientific format takes a real... 
STD 
This operation enables the standard format for real numbers on the calculator. In standard format, a number will... 
UNDO 
This operation enables or disables the Undo functionality on the calculator. The Undo function allows you to recall... 
Operation  Description 

ACOS 
This operation calculates the inverse cosine... 
ARG 
This function takes a complex argument and returns the angle given the real and imaginary components of that complex... 
ASIN 
This operation calculates the inverse sine... 
ATAN 
This operation calculates the inverse tangent... 
COS 
This operation calculates the cosine function of... 
C→R 
This function takes a complex value and returns the individual components of that complex value. It pushes the real... 
D→R 
This function takes a real number which is an angle expressed in degrees and converts it to an angle expressed in... 
HMS+ 
This function takes arguments and returns results which express a time as hours, minutes, seconds and fractions of... 
HMS 
This function takes arguments and returns results which express a time as hours, minutes, seconds and fractions of... 
HMS→ 
This function takes a real argument which describes a time as hours, minutes and seconds and converts that time into... 
P→R 
This function takes a complex value expressed in polar coordinates, a radius and an angle, and returns a complex... 
R→C 
This function takes two real values and returns a complex value. One real value is used as the real component of... 
R→D 
This function takes a real number which is an angle expressed in radians and converts it to an angle expressed in... 
R→P 
This function takes a complex value expressed in rectangular coordinates and returns a complex value expressed in... 
SIN 
This operation calculates the sine function of... 
TAN 
This operation calculates the tangent function of... 
→HMS 
This function takes a real argument which describes a time as hours and fractions of hours (the decimal component)... 
Operation  Description 

ACOSH 
This operation calculates the inverse hyperbolic cosine... 
ALOG 
This operation calculates the reverse base 10 logarithm of its... 
ASINH 
This operation calculates the inverse hyperbolic sine... 
ATANH 
This operation calculates the hyperbolic sine... 
COSH 
This operation calculates the hyperbolic cosine... 
EXP 
This operation calculates the reverse base e logarithm... 
EXPM 
This operation calculates the equivalent of (EXP(x)  1) where x is the the argument... 
LN 
This operation calculates the natural logarithm (base e)... 
LNP1 
This operation calculates the equivalent of LN(1 + x) where x is the the argument from... 
LOG 
This operation calculates the base 10 logarithm of its input... 
SINH 
This operation calculates the hyperbolic sine... 
TANH 
This operation calculates the hyperbolic tangent... 
Operation  Description 

ISOL 
This operation takes an expression and a symbol. It then searches for that symbol in that expression. The first... 
QUAD 
This operation takes an expression and a symbol and finds the root of the expression using the... 
RCEQ 
This operation looks up the symbol "EQ" in the current directory or one of its parents and pushes the value of that... 
ROOT 
This operation takes an expression, a symbol to solve for and a real, complex or list of guesses and produces a... 
SHOW 
This operation takes an expression and a target symbol. It then recursively evaluates the value of each symbol in... 
SOLVR 
This operation gets the value of EQ from the current directory or one of its parent and goes into a special mode... 
STEQ 
This operation takes any item from the stack and stores it in the current directory under the symbol "EQ". Normally... 
Operation  Description 

*H 
This operation takes a real number from the top of the stack. It then adjusts the plot minimum (see... 
*W 
This operation takes a real number from the top of the stack. It then adjusts the plot minimum (see... 
AXES 
This operation takes a complex number from the top of the stack and interprets that complex number as X and Y... 
CENTR 
This operation takes a complex number from the top of the stack and interprets that complex number as X and Y... 
DRAW 
This operation will plot the current equation which was specified with the STEQ... 
INDEP 
This operation takes a symbol from the top of the stack. The symbol specifies the "independent variable" to use... 
PMAX 
This operation takes a complex number from the top of the stack and interprets that complex number as X and Y... 
PMIN 
This operation takes a complex number from the top of the stack and interprets that complex number as X and Y... 
PPAR 
This operation is really just a shortcut for accessing a symbol called "PPAR" from the current directory. The PPAR... 
RCEQ 
This operation looks up the symbol "EQ" in the current directory or one of its parents and pushes the value of that... 
RES 
This operation takes a real number from the top of the stack and interprets that number as the "resolution" to use... 
STEQ 
This operation takes any item from the stack and stores it in the current directory under the symbol "EQ". Normally... 
Operation  Description 

%T 
Given Real_{1} and Real_{2} from the stack, this function computes 100 * Real_{2} / Real... 
ABS 
This function returns the absolute value of its input argument. For a real number input, the result is always a... 
CEIL 
Given a real valued input, this function returns the smallest integer which is greater than or equal to the input... 
FACT 
This function returns the factorial of its input parameter. For integer input values greater than or equal to 0,... 
FLOOR 
Given a real valued input, this function returns the largest integer which is less than or equal to the input value... 
FP 
This function takes a real value and returns a real value, returning only the fractional component of that input... 
IP 
This function takes a real value and returns a real value, removing any fractional component of that input value.... 
MANT 
This function returns the mantissa of the input real value. Assuming that the real value is expressed in scientific... 
MAX 
This function returns the largest of the two real values it takes as input. 
MAXR 
This operation returns a symbol which represents the largest real value which can be represented on the calculator... 
MIN 
This function returns the smallest of the two real values it takes as input. 
MINR 
This operation returns a symbol which represents the smallest real value greater than zero which can be represented... 
MOD 
This function returns the modulus or remainder of its two real valued inputs. 
NEG 
Given a real or complex input, this function returns the value of that input multiplied by 1. Given a matrix or... 
RAND 
This operation takes no input parameters and returns a random real valued result. The value is greater than or... 
RDZ 
This function takes a real valued random seed for use in future random numbers generated from... 
RND 
Given the formatting mode for numbers, this function rounds those numbers to the digits displayed, removing any... 
SIGN 
If given a positive real value, this function returns 1. If the real value is 0, this function returns 0. If this... 
XPON 
This function returns the exponent of the input real value. Assuming that the real value is expressed in scientific... 
Operation  Description 

ABS 
This function returns the absolute value of its input argument. For a real number input, the result is always a... 
ARG 
This function takes a complex argument and returns the angle given the real and imaginary components of that complex... 
CONJ 
This function takes a complex value and returns its conjugate value. A conjugate value has the same real component... 
C→R 
This function takes a complex value and returns the individual components of that complex value. It pushes the real... 
IM 
This function takes a complex value as input and returns the imaginary component of that complex number. If the... 
NEG 
Given a real or complex input, this function returns the value of that input multiplied by 1. Given a matrix or... 
P→R 
This function takes a complex value expressed in polar coordinates, a radius and an angle, and returns a complex... 
RE 
This function takes a complex value as input and returns the real component of that complex number. If the input... 
R→C 
This function takes two real values and returns a complex value. One real value is used as the real component of... 
R→P 
This function takes a complex value expressed in rectangular coordinates and returns a complex value expressed in... 
SIGN 
If given a positive real value, this function returns 1. If the real value is 0, this function returns 0. If this... 
Operation  Description 

ABS 
This function returns the absolute value of its input argument. For a real number input, the result is always a... 
ARRY→ 
This operation takes a vector or matrix and pushes each value within that array followed by a list describing the... 
CNRM 
This operation calculates the column norm or onenorm... 
CON 
This operation is used to create an array of constant values. The resulting array will have all values set to the... 
CONJ 
This function takes a complex value and returns its conjugate value. A conjugate value has the same real component... 
CROSS 
This operation calculates the cross product of the input... 
C→R 
This function takes a complex value and returns the individual components of that complex value. It pushes the real... 
DET 
This operation calculates the determinant of its input... 
DOT 
This operation calculates the dot product of its arguments.... 
GET 
This operation is used to retrieve an item at a particular index within a list. The list to retrieve from may be... 
GETI 
This operation is used to retrieve an item at a particular index within a list, vector or matrix. When operating on... 
IDN 
This operation returns an identity matrix. An identity matrix has values zero in all positions except along the... 
IM 
This function takes a complex value as input and returns the imaginary component of that complex number. If the... 
NEG 
Given a real or complex input, this function returns the value of that input multiplied by 1. Given a matrix or... 
PUT 
This operation is used to replace an item in a list, vector or matrix at a particular index. It can either modify... 
PUTI 
This operation is used to replace an item in a list, vector or matrix at a particular index. It can either modify a... 
RDM 
This operation redimensions an input vector or matrix according to the size specified by the list. If the list has... 
RE 
This function takes a complex value as input and returns the real component of that complex number. If the input... 
RNRM 
This operation calculates the row norm or infinity norm... 
RSD 
This operation calculates the residual of its inputs which is:

R→C 
This function takes two real values and returns a complex value. One real value is used as the real component of... 
SIZE 
This operation takes a string, list, vector, matrix or expression argument. In the case of a string, it pushes the... 
TRN 
This operation returns the transpose of its input array. The input array can be directly on the stack in which case... 
→ARRY 
This operation is used to create vectors and matrices from multiple values on the stack. If the top of the stack is... 
Operation  Description 

AND 
This operation performs a binary and operation on... 
ASR 
This operation takes an integer from the stack, shifts each bit one... 
BIN 
This operation puts the calculator in binary mode... 
B→R 
This operation takes an integer value an converts it to the equivalent real value. 
DEC 
This operation puts the calculator in decimal mode. Integer... 
HEX 
This operation puts the calculator in hexadecimal mode.... 
NOT 
This operation performs a binary not operation on... 
OCT 
This operation puts the calculator in octal mode. Integer values... 
OR 
This operation performs a binary or operation on its... 
RCWS 
This operation gets the word size of all integer values on the calculator. It pushes a real value to the stack... 
RL 
This operation takes an integer from the stack, shifts each bit one... 
RLB 
This operation takes an integer from the stack, shifts each byte one... 
RR 
This operation takes an integer from the stack, shifts each bit one... 
RRB 
This operation takes an integer from the stack, shifts each byte one... 
R→B 
This operation takes a real number and converts it to an integer value. If the real value is less than 0, then the... 
SL 
This operation takes an integer from the stack, shifts each bit one... 
SLB 
This operation takes an integer from the stack, shifts each byte one... 
SR 
This operation takes an integer from the stack, shifts each bit one... 
SRB 
This operation takes an integer from the stack, shifts each byte one... 
STWS 
This operation sets the word size of all integer values on the calculator. It takes a real value, rounds it to the... 
XOR 
This operation performs a binary xor operation on... 
Operation  Description 

CHR 
This operation takes a real value and maps it to a single character which it returns as a string value. The real... 
NUM 
This operation takes a string value and maps it to a real value. The first character in the string is used to... 
POS 
This operation is used to find the position of a substring within a string or the position of an item in a list. If... 
SIZE 
This operation takes a string, list, vector, matrix or expression argument. In the case of a string, it pushes the... 
STR→ 
This operation takes a string from the stack and interprets its contents as though it was just entered and the... 
SUB 
This operation extracts a substring or a sublist from a string or a list. If it is provided a string and two real... 
→STR 
This operation pops one argument from the stack and converts that item into a string. Whatever was displayed on the... 
Operation  Description 

GET 
This operation is used to retrieve an item at a particular index within a list. The list to retrieve from may be... 
GETI 
This operation is used to retrieve an item at a particular index within a list, vector or matrix. When operating on... 
LIST→ 
This operation expects a list at the top of the stack. It then pushes each item from that list into the stack,... 
POS 
This operation is used to find the position of a substring within a string or the position of an item in a list. If... 
PUT 
This operation is used to replace an item in a list, vector or matrix at a particular index. It can either modify... 
PUTI 
This operation is used to replace an item in a list, vector or matrix at a particular index. It can either modify a... 
SIZE 
This operation takes a string, list, vector, matrix or expression argument. In the case of a string, it pushes the... 
SUB 
This operation extracts a substring or a sublist from a string or a list. If it is provided a string and two real... 
→LIST 
This operation expects a real number at the top of the stack which is the size of the list it should create. Then,... 
Operation  Description 

DEPTH 
This operation pushes a real number onto the stack which is the number of items on the stack (not including this new... 
DROP2 
This operation removes the top two items from the stack. 
DROPN 
This operation takes a real number from the top of the stack which indicates how many other items should be popped... 
DUP 
This operation creates a copy of the item at the top of the stack and pushes that copy onto the stack. Note... 
DUP2 
This operation makes copies of the top two items on the stack and pushes both copies onto the stack. 
DUPN 
This operation takes a real number from the top of the stack which indicates how many items from the stack to... 
LIST→ 
This operation expects a list at the top of the stack. It then pushes each item from that list into the stack,... 
OVER 
This operation creates a copy of the item just below the top of the stack and pushes that item onto the stack. 
PICK 
This operation takes a real number which references an item on the stack. After popping that real number off of the... 
ROLLD 
This operation takes a real number from the stack which is the number of items on the stack to roll down. The item... 
ROT 
This operation rotates the top three items on the stack. In the stack diagram, Item_{3} was at the top of... 
→LIST 
This operation expects a real number at the top of the stack which is the size of the list it should create. Then,... 
Operation  Description 

SCONJ 
This operation takes a symbol from the stack. It looks for the value of that symbol in the current directory,... 
SINV 
This operation takes a symbol from the stack. It looks for the value of that symbol in the current directory,... 
SNEG 
This operation takes a symbol from the stack. It looks for the value of that symbol in the current directory,... 
STO* 
This operation takes a symbol and another item of just about any numeric type (real, complex, integer or matrix).... 
STO+ 
This operation takes a symbol and another item of just about any numeric type (real, complex, integer or matrix).... 
STO 
This operation takes a symbol and another item of just about any numeric type (real, complex, integer or matrix).... 
STO/ 
This operation takes a symbol and another item of just about any numeric type (real, complex, integer or matrix).... 
Operation  Description 

CLUSR 
This operation is used to clear all variables and empty directories in the current directory. Any directories which... 
CRDIR 
This operation takes a symbol and creates a directory with that name in the current directory. Directories are good... 
HOME 
This operation changes the current directory to the root directory, regardless of where in the symbol hierarchy the... 
MEM 
This operation pushes the amount of free memory in bytes onto the stack as a real value. 
MENU 
This operation has two different modes. If the top of the stack contains a real number, it uses that real number as... 
ORDER 
This operation takes a list of symbols and reorders those symbols in the current directory to match the order in... 
PATH 
This operation pushes a list onto the stack which contains the set of directories which leads to the current... 
VARS 
This operation pushes a list onto the stack which contains the set of variables and directories in the current... 
Operation  Description 

ABORT 
The ABORT operation can be used within an executing program to halt execution and discard execution state. Because... 
ERRM 
This operation pushes a string onto the stack which is the error message most recently raised by the calculator.... 
ERRN 
The ERRN operation returns a numerical value which represents the most recently raised error by the calculator.... 
HALT 
This operation should be used only during execution of a program. By placing a HALT operation within a program, you... 
KILL 
The KILL operation can be used within a program or outside of program execution. When used within a program, it... 
SST 
This operation will single step the currently HALTed program. By placing a HALT at... 
WAIT 
This operation takes a real number which represents the number of seconds to pause before continuing execution. The... 
Operation  Description 

DO 
The DO operation is used to define a loop structure within a program. It is combined with the... 
ELSE 
This operation is used in conjunction with the IF or IFERR... 
END  
FOR 
The FOR operation is used to define a loop structure within a program. It is combined with the... 
IF 
The IF operation can be used within program execution context to control the flow of execution through the program... 
IFERR 
The IFERR operation can be used within program execution context to control the flow of execution through the... 
IFT 
The IFT operation is an alternative to the IF operation. In this form, IFT pops two... 
IFTE 
The IFTE operation is an alternative to the IF operation. In this form, IFTE pops three... 
NEXT 
This operation is used in conjunction with the START or FOR... 
REPEAT 
This operation is used in conjunction with the WHILE operation. See that page for... 
START 
The START operation is used to define a loop structure within a program. It is combined with the... 
STEP 
This operation is used in conjunction with the START or FOR... 
THEN 
This operation is used in conjunction with the IF or IFERR... 
UNTIL 
This operation is used in conjunction with the DO operation. See that page for more... 
WHILE 
The WHILE operation is used to define a loop structure within a program. It is combined with the... 
Operation  Description 

== 
This operation produces a 1 if the two arguments are equal, a 0 otherwise. It can operate on real, complex, integer... 
AND 
This operation performs a binary and operation on... 
CF 
This operation takes a real value between 1 and 64 and sets the associated flag bit to zero. See... 
FC? 
This operation takes a real value between 1 and 64 and returns 1 if the associated bit in the calculator flags is 0... 
FC?C 
This operation takes a real value between 1 and 64 and returns 1 if the associated bit in the calculator flags is 0... 
FS? 
This operation takes a real value between 1 and 64 and returns 1 if the associated bit in the calculator flags is 1... 
FS?C 
This operation takes a real value between 1 and 64 and returns 1 if the associated bit in the calculator flags is 1... 
NOT 
This operation performs a binary not operation on... 
OR 
This operation performs a binary or operation on its... 
RCLF 
This operation retrieves the current calculator flags and pushes it as an integer value onto the stack. See... 
SAME 
This operation takes two items from the stack and pushes a real value which is 1 if the two items are the same,... 
SF 
This operation takes a real value between 1 and 64 and sets the associated flag bit to one. See... 
STOF 
This operation takes an integer value from the stack and sets the calculator flags to this value. See... 
TYPE 
This operation pops an item off the stack and then pushes a real number depending on the type of item it just popped... 
XOR 
This operation performs a binary xor operation on... 
Operation  Description 

COLCT 
The COLCT operation collects terms and factors in order to simplify an expression. It does this by doing the... 
EXGET 
The EXSUB operation is used to retrieve a portion of an expression. The real argument identifies the subexpression... 
EXPAN 
The EXPAN operation expands an expression using a series of different strategies: 
EXSUB 
The EXSUB operation is used to substitute a portion of an expression with the item from the top of the stack. The... 
FORM 
This operation takes an expression and allows you to interactively modify that expression in a way that does not... 
ISOL 
This operation takes an expression and a symbol. It then searches for that symbol in that expression. The first... 
OBGET 
The OBGET operation is used to retrieve a portion of an expression and return it as an item in a list. The real... 
OBSUB 
The OBSUB operation is used to substitute a portion of an expression with the contents of a list. The real argument... 
QUAD 
This operation takes an expression and a symbol and finds the root of the expression using the... 
SHOW 
This operation takes an expression and a target symbol. It then recursively evaluates the value of each symbol in... 
SIZE 
This operation takes a string, list, vector, matrix or expression argument. In the case of a string, it pushes the... 
TAYLR 
This operation calculates an approximation of the Taylor series... 
Operation  Description 

CL∑ 
This operation deletes a variable called ∑DAT which normally contains a real matrix of samples used by other... 
COL∑ 
This operation is used to designate the dependent and independent column in the statistics data. Real_{1}... 
COMB 
This operation calculates the number of combinations given... 
CORR 
This operation calculates the correlation... 
COV 
This operation calculates the covariance between the dependent... 
LR 
This operation calculates the linear regression between... 
MAX∑ 
This operation gets the maximum values from the statistics data. It expects to find a variable called ∑DAT which... 
MEAN 
This operation calculates the mean of the statistics data... 
MIN∑ 
This operation gets the minimum values from the statistics data. It expects to find a variable called ∑DAT which... 
N∑ 
This operation returns the number of samples in the statistics data. It expects to find a variable called ∑DAT... 
PERM 
This operation calculates the number of permutations given... 
PREDV 
This operation predicts a value for the dependent variable given an input value from the independent variable by... 
RCL∑ 
This operation pushes the value stored in the ∑DAT variable onto the stack. If the ∑DAT variable does not exist,... 
SDEV 
This operation calculates the standard deviation of... 
STO∑ 
This operation takes the item from the top of the stack and stores it into a variable called ∑DAT. If the ∑DAT... 
TOT 
This operation calculates the total of the statistics data. It expects to find a variable called ∑DAT which has a... 
UTPC 
This operation calculates the probability given a ... 
UTPF 
This operation calculates the probability given a F... 
UTPN 
This operation calculates the probability given a normal... 
UTPT 
This operation calculates the probability given a ... 
VAR 
This operation calculates the variance of the statistics data.... 
∑+ 
This operation takes a single real value or a single vector or matrix from the stack and adds the value(s) to the ∑... 
∑ 
This operation removes and returns the last sample from the statistics data. It expects to find a variable called ∑... 