RENUMBER (REN.)	Assign default (or specified) line numbers to a
	BASIC program.
REPEAT (REP.)	Part of the REPEAT...UNTIL loop which executes
	all statements between REPEAT and UNTIL until a
	condition or conditions are satisfied. Note that such a
	loop is always executed at least once, even if the
	terminating conditons are met immediately, as the
	test for the conditions comes at the end of the loop.
REPORT (REPO.)	Print an error message for the most recent error
	found.
RESTORE (RES.)	Read further data beginning at the line number
	following the RESTORE.
RETURN (R.)	Indicate the end of a subroutine which has been
	called using GOSUB. The computer returns to the
	statement in the program which is immediately after
	the GOSUB which called the routine.
RIGHT$( (RI.)	Extract the right-hand part of a string from a longer
	string.
RND	Function which produces a random number. RND(1)
	gives a random decimal from 0 to 0.99999. RND(N)
	gives a random integer from 1 to N inclusive.
RUN	Execute the program in memory.
SAVE (SA.)	Save a program in the computer's memory to disc.
SGN	Function which gives the sign of the number
	following, producing 1 for minus numbers, 0 for
	zero and + 1 for positive numbers.
SIN	Function which gives the sine of any angle, the angle
	being in radians.
SOUND (SO.)	Produce a sound through the internal loudspeaker.
SPC	Used only with PRINT or INPUT to print multiple
	spaces.
SQR	Function which finds the square root of the number
	that follows.
STEP	Part of the FOR...TO..STEP statement which allows
	a FOR...NEXT loop with steps other than 1.
App 6.7