IBM 5100 Basic Reference Manual page 63

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OPEN - Activates files for input or output.
PAUSE - Interrupts program execution.
PRINT (FLP) - Displays or prints the values of specified variables, expressions
or constants.
PRINT USING (FLP) - Displays or prints the values of specified variables, expres-
sions or constants in a format defined in an image statement.
PUT - Writes the values of specified variables into a tape file.
READ - Assigns values from the internal table (see DA TA) to variables or array
elements.
REM - Inserts comments or remarks into a program.
RESET - Repositions a tape file to its beginning or to its end.
RESTORE - Causes values in the internal data table (see DATA) to be assigned
starting with the first table value.
RETURN - Ends a current subroutine.
STOP - Ends a program.
USE - Saves variables to be used by successive programs.
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