$EXECUTABLE_NAME

IO::Handle->input_record_separator( EXPR )

$^M By default, running out of memory is an untrappable, fatal error. However, if suitably built, Perl can use the contents of

$REAL_GROUP_ID

${^OPEN} An internal variable used by PerlIO. A string in two parts, separated by a \0 byte

IO::Handle->output_field_separator( EXPR )

$OUTPUT_AUTOFLUSH

$& The string matched by the last successful pattern match (not counting any matches hidden within a BLOCK or

$EGID

HANDLE->autoflush( EXPR )