$+ The text matched by the last bracket of the last successful search pattern. This is useful if you don't know which one of a set of alternative

%LAST_PAREN_MATCH

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

${^UTF8LOCALE} This variable indicates whether a UTF-8 locale was detected by perl at startup. This information is used by perl when it's in

$PROCESS_ID

$) The effective gid of this process. If you are on a machine that supports membership in multiple groups simultaneously, gives a space separated

$% The current page number of the currently selected output channel. Mnemonic:

$OFS

$@ The Perl syntax error message from the last eval()

$BASETIME