Retrieving forgotten serial number for adobe CS4

I have Adobe CS4 installed on my iMac, but I forgot where I wrote down the serial number. I want to move it to a different computer in the future, but I would need the serial number to reinstall in. Is there some way I can get it? The current install is activated and working fine on my iMac, but how do I get the serial number that I activated it with?

Thanks.

Assuming you bought the product from a physical store and have a CD you can call up adobe and be able to send in some physical proof that you do in fact have a licensed copy of CS4. Otherwise if you bought it online then you should still have the email with the install/serial, and your adobe account should show that you bought it.

Simply put, if it's a legit copy (I'm not saying it isn't, it most likely is) then just contacting adobe should be the quickest way to get this resolved.