$a

$CHILD_ERROR

$? The status returned by the last pipe close, backtick (`` ) command, successful call to

$FORMAT_LINE_BREAK_CHARACTERS

$^S Current state of the interpreter. $^S State ---------

$ACCUMULATOR

HANDLE->format_lines_left(EXPR)

${^WIN32_SLOPPY_STAT} If this variable is set to a true value, then

$: The current set of characters after which a string may be broken to fill continuation fields (starting with ^)

$ARGV Contains the name of the current file when reading from <> .