TAB	Intrinsic	append spaces to PRINT string to get to column n
THEN	Auxiliary	in IF ... THEN ... ELSE ... ENDIF blocks
TO	Auxiliary	in FOR...NEXT blocks and ATTACH statements
TRIM$()	Intrinsic	remove spaces and tabs from left & right of string
TRUE	Statement	optional in SELECT CASE statements
TYPE	Statement	declare/define user-defined composite data type
TYPE()	Intrinsic	return type number of variable, array, component
UBOUND()	Intrinsic	upper bound of any dimension of an array
UBYTE	Statement	declare variables to be type UBYTE
UBYTE()	Intrinsic	convert variable to type UBYTE
UBYTEAT()	Intrinsic	write UBYTE value into specified memory address
UBYTEAT()	Intrinsic	read UBYTE value from specified memory address
UCASE$()	Intrinsic	convert contents of string to upper case
ULONG	Statement	declare variables to be type ULONG
ULONG()	Intrinsic	convert variable to type ULONG
ULONGAT()	Intrinsic	write ULONG value into specified memory address
ULONGAT()	Intrinsic	read ULONG value from specified memory address
UNION	Statement	declare/define user-defined composite data type
UNTIL	Auxiliary	in DO and LOOP statements
USHORT	Statement	declare variables to be type USHORT
USHORT()	Intrinsic	convert variable to type USHORT
USHORTAT()	Intrinsic	write USHORT value into specified memory address
USHORTAT()	Intrinsic	read USHORT value from specified memory address
VERSION	Statement	define version number of program
VERSION$()	Intrinsic	return version number defined by VERSION statement
VOID	Statement	declare that a function returns no value
WHILE	Auxiliary	in DO and LOOP statements
WRITE	Statement	wWrite variables to a file
XLONG	Statement	declare variables to be type XLONG
XLONG()	Intrinsic	convert variable to type XLONG
XLONGAT()	Intrinsic	write XLONG value into memory at specified address
XLONGAT()	Intrinsic	read XLONG value from memory at specified address
XMAKE()	Intrinsic	retype to XLONG from any type (MSW if GIANT/DOUBLE)
XOR	Operator	bitwise exclusive-OR operator