What are those numbers on Credit Cards?

[Deal_or_No_deal]

[img]http://cache.gawkerassets.com/assets/images/4/2011/01/340x_CrackingCreditCode1.jpg[/img]

[StoneCold]

F@!n F@!n F@!n *=: *=: *=: *=:

[TomandJerry]

:0012391: :0012391: :0012391: :0012391: *=: *=: *=:

[CheGuevara]

*=: but  %<>( %<>( %<>( %<>(

[Bondu_Babu]

*=: *=: *=: *=: *=: *=:

[indian308]

*=: *=: *=: *=: *=:

[Bhargav2010]

[quote author=Deal_or_No_deal link=topic=147549.msg1704072#msg1704072 date=1296012474]
[img]http://cache.gawkerassets.com/assets/images/4/2011/01/340x_CrackingCreditCode1.jpg[/img]
[/quote] *=: *=: *=:

[bevars__babu]

[img]http://www.bewarsetalk.net/discus/movieanimated1/bemmi.entry.gif[/img]

[Maximus]

[quote author=Deal_or_No_deal link=topic=147549.msg1704072#msg1704072 date=1296012474]
[img]http://cache.gawkerassets.com/assets/images/4/2011/01/340x_CrackingCreditCode1.jpg[/img]
[/quote] sHa_clap4 sHa_clap4 sHa_clap4 sHa_clap4

[perk]

sCo_hmmthink sCo_hmmthink sCo_hmmthink didn't work