Apple has said today that it has started receiving orders for its new 'Leopard' operating system. The latest OS should be on sale from 26th October. Apple fans should expect new backup features and archive control over changes made to files. Mac owners can pre-order the software via Apple's online shop. In the UK the price for a single version will be £85. A family pack, which means it can be installed on up to five computers, will cost £129. Reuters