This befuddles me...

  1 # IO::Socket.pm
  2 #
  3 # Copyright (c) 1997-8 Graham Barr <gbarr@pobox.com>. All rights r
+eserved.
  4 # This program is free software; you can redistribute it and/or
  5 # modify it under the same terms as Perl itself.
  6 
  7 package IO::Socket;
  8 
  9 require 5.006;
 10 
 11 use IO::Handle;
 12 use Socket 1.3;
 13 use Carp;
 14 use strict;
 15 our(@ISA, $VERSION, @EXPORT_OK);
 16 use Exporter;
 17 use Errno;
 18
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And then in Socket....

  1 package Socket;
  2 
  3 our($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
  4 $VERSION = "1.82";
[download]

So package and version are defined.....