$^T The time at which the program began running, in seconds since the epoch (beginning of 1970). The values returned by the -M, -A

$^L What formats output as a form feed. The default is \f . You

%LAST_PAREN_MATCH

$LAST_REGEXP_CODE_RESULT

${^UNICODE} Reflects certain Unicode settings of Perl. See

@LAST_MATCH_END

$SUBSCRIPT_SEPARATOR

${^ENCODING} DEPRECATED!!! The object reference to the Encode