How can I find my 'zip code' I thought it was only a US thing

What country are you in?

Most countries have some sort of postal code. I think only the US calls it a Zip code. If you are in the US, go to usps.com.

The UK has a site. Just googled it

http://www.royalmail.com/portal/rm/postcodefinder;jsessionid=0HK1SUZKI2GEUFB2IGEEQEQU HRAYMQ2K?catId=400145&pageId=pcaf_pc_search&gear=postcode

Oh right so my postcode would be my zip code

Yep, just check your incoming mail and you will see your postal code, same as zip code. Different terms in different countries.

ZIP = Zone Improvement Code that was implemented in the 70's (I think) in the US.

Makes delivery of mail more efficient - :cough, yeah right, cough: