DEVICE NAMES

DOS uses several standard device names to refer to devices that most computers
have. The device names are shown ending with a colon (:), but it is optional
in almost all cases. Device names are useful with redirection and commands
like COPY, ECHO, ESC, FIND, SORT and TYPE.

CAS1:	is the cassete tape deck	LPT1:
	[pre-DOS 2.0 only]		PRN:	all refer to printer ports.
CLOCK$:	is the system clock. CLOCK$	LPT2:	(PRN: is a synonym for LPT1:)
	cannot be used as the name	LPT3:
	of a file.
COM1:					MOUSE$: is the mouse. [OS/2 only]
AUX:	refer to communications ports.
COM2:	(AUX: is a synonym for COM1:	NUL:	is a nonexistent device. 
COM3:	on older systems.)			Writing never fills it up,
						reading never gets any data
CON:	is the console -- commands are		from it.
	entered on the keyboard and
	output is displayed on the	POINTER$: is the cursor controlled by
	console screen.				the mouse. [OS/2 only]

KBD$:	is the keyboard. [OS/2 only]	SCREEN$: is the screen. [OS/2 only]
