Apple today revealed a new way to take a step back in time - Time Machine.

Time Machine is a new auto-save feature that will be available off the shelf with the release of Mac OS X 10.5. The new feature makes backup easy and effective for Mac users.

Time Machine automatically backs up everything on the Mac to an external hard drive or Mac OS X Server. In the event a file is lost, users can search back using an intuitive time-based visual display to find and then instantly restore the file - with just one click. Time Machine can restore anything from a single file or photo, to everything on a Mac.

This new feature will be available within the next generation of Apple's Vista-competing Mac OS X 10.5. It lets users set auto-saves of data to local hard drive or remote online servers.

Apple CEO Steve Jobs observed: "Only 26 per cent of people back-up files."

This software creates regular archives locally or remotely, so users can retrieve historical data.