How OS X Lion helps keep Your Files Safe

On the left is the current document and the ones on the right are previous versions saved on your hard drive
Thanks to Lion, lost work could become a thing of the past. Barring the failure of your Mac's hard drive, you need no longer worry about losing work if the app in question crashes.

This is because OS X Lion has two clever systems built into it: Auto Save and Versions. Provided you're using an app that has support for these two features built in, your Mac automatically saves what you do as you go along.

We're going to take a look at how these two systems work so that you can make the most of them.