Ok this will obviously be different throughout the world as there are different types of plates in different countries and even different types within different states in the same country and then different types within the same state.

I used to have a number plate NIXCAR because my name is Nick and it was my car - thats where NIX comes from.

That form of number plate is known as a custom plate and got to the point where it was costing me AU$488 extra on top of my car registration to have it.

People used to ask me all the time what it stood for ???

Anyway a pool company in Sydney called Creative Pools has a truck with CRE8IV for their plate. Again a custom plate.

Yesterday I saw a bright yellow car with EGY01K which is clever and uses one of standard formats of XXX99X so would have been a custom plate within that category but only costs AU$100 a year extra to have.

Full details of NSW plate formats and a simulator goto http://www.rta.nsw.gov.au/myPlates/index.jsp