@INC The array @INC contains the list of places that the

IO::Handle->format_formfeed(EXPR)

ARGV The special filehandle that iterates over command-line filenames in @ARGV . Usually

$^X The name used to execute the current copy of Perl, from C's argv[

$FORMAT_LINES_LEFT

$ARG

%ENV The hash %ENV contains your current environment. Setting a value in

$^D The current value of the debugging flags. May be read or set. Like its command-line equivalent, you can use numeric or symbolic values

$SYSTEM_FD_MAX

$ORS