OPENOUT (OPENO.)	Open a file for output only.
OPENUP	Open a file for updating (input and output).
OR	Used as a logical or bitwise operator.
OSCLI ||	Used to pass a string to the operating system.
PAGE (PA.) ||	Variable used by the computer to indicate the
	memory location at which storage of the program
	begins. PAGE can be reset by the user, so with care
	it is possible to have several programs in the
	computer memory at the same time.
PI	Give the value of pi (3.141592653) for use in
	calculations.
PLOT (PL.)	Carry out a plotting function according to the
	parameters following the PLOT command (see the
	full list of PLOT codes in Appendix 8).
POINT( (PO.)	Give the logical colour number at a particular
	graphics point.
POS	Give the current x coordinate of the text cursor.
PRINT (P.)	Print characters to the screen. The format of
	printing is affected by the use of ; , ' and the
	printing of numbers is controlled by the value of the
	integer variable @%.
PRINT# (P.#)	Print the variable values following PRINT# to an
	open file.
PROC	Define or call a procedure.
PTR#	Function which gives the position within a file where
	the next characters will be read or written. The user
	can change the value of PTR# and can thus read or
	write anywhere within the file, allowing random
	access to records.
RAD	Function which converts an angle from degrees to
	radians.
READ	Read items from a DATA statement.
REM	A remark to help document the program. REMs are
	ignored by the computer on execution of the
	program.
App 6.6