Only a few keys. On the US layout, a shifted '2' key gives '@', and a shifted '3' key gives '#'.
On a UK layout, the shifted '2' gives double quotation marks and the shifted '3' gives the symbol for UK pounds. The apostrophe/quotes key on a US keyboard is replaced by a key for '#' and '@', depending on whether or not it's shifted. I've yet to find the apostrophe key on the UK layout...
My A600 has a UK keyboard. If I'm using it and another machine at the same time, it can get a little confusing :crazy: