Most every perl comes with perldoc 
$ perldoc -v $_
    $ARG
    $_      The default input and pattern-searching space. The followi
+ng
... ... ... ... ... ... ...
            (Mnemonic: underline is understood in certain operations.)

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In reply to Re^5: Dereferencing a Hash of Arrays by Anonymous Monk
in thread Dereferencing a Hash of Arrays by toro

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