is the serial number on the motherboard unique

Merrill Oveson moveson at
Mon May 11 14:41:24 MDT 2009

Is the serial number of the motherboard unique?

I need a way to uniquely identify a computer (PC) from all other computers
(PCs) in the world.

I thought about using MAC address - but what if the computer doesn't have a
network card?

Then I thought all computers must have a motherboard - so why not use the
serial number from it?

Good idea, or is there something better?

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