SHELL command
(SHELL command wordflag)

	Under Unix, outputs the result of running "command" as a shell
	command.  (The command is sent to /bin/sh, not csh or other
	alternatives.)  If the command is a literal list in the instruction
	line, and if you want a backslash character sent to the shell, you
	must use \\ to get the backslash through Logo's reader intact.  The
	output is a list containing one member for each line generated by
	the shell command.  Ordinarily each such line is represented by a
	list in the output, as though the line were read using READLIST.  If
	a second input is given, regardless of the value of the input, each
	line is represented by a word in the output as though it were read
	with READWORD.  Example:

			to dayofweek
			output first first shell [date]
			end

	This is "first first" to extract the first word of the first (and
	only) line of the shell output.

	Under DOS, SHELL is a command, not an operation; it sends its
	input to a DOS command processor but does not collect the result
	of the command.

	The Macintosh, of course, is not programmable.


