London transpot system

I came here in london approximately 11 months ago for higher studies from Pakistan. Everything over here is nice to me but the thing which really fascinated me is the transport system in London and especially the London underground train system. In the buses just like in Pakistan there is no concept of conductor who collects the fares from passengers. In London you have just to touch your card with a machine inside the bus and your money for travelling will be deducted automatically. And inside the buses there run a slide with the name of each and every stop along with the speaker. So every one can listen and read the name of their desired stops very easily and clearly.