what is the difference between a us and uk keyboard layout?
The UK keyboard has 1 more key than the U.S. keyboard (UK=62, US=61, on the typewriter keys) The Alt key to the right of the space bar is replaced by an AltGr key. The # symbol is replaced by the £ symbol and a 102nd key is added next to the Enter key to accommodate the displaced # € is produced by AltGr + 4.