Operations, Commands, And Functions - HP -28S Manual

Operations, Commands,
and Functions
17
Each procedure built into the HP-28S can be classified as an opera-
tion, a command, a function, or an analytic function.
• An
operation
is any procedure built into the calculator.
• A
command
is a programmable operation.
• A
function
is a command allowed in algebraics.
• An
analytic function
is a function for which the HP-28S provides a
derivative and inverse.
Built-in procedures are usually characterized by their highest capabil-
ity. For example, SWAP and IP are both commands, but we
characterize SWAP as a command and IP as a function. The following
table shows examples of each type.
Operations
Commands
Non-Programmable
Operations
RPN
Functions
Commands
Non-Analytic Analytic
[ill[] SWAP ABS ASIN
I NEXT I
DROP
a
EXP
.IEDITI
LAST IP INV
.1
VIEWt I
RCL MAX LN
I ENTER I
PURGE
OR NEG
I EEX I
J
%CH SIN
.1
COMMAND I
STO R-D SINH
.1
UNDO I
EVAL
R-P
sa
.1
CONTI
CLEAR XPON
+
IONI
CONVERT
'*
=
164 17: Operations, Commands, and Functions