When you suspend the computer, you send it to sleep. All of your applications and documents remain open, but the screen and other parts of the computer switch off to save power. The computer is still switched on though, and it will still be using a small amount of power. You can wake it up by pressing a key or clicking the mouse. If that does not work, try pressing the power button.

Some computers have problems with hardware support which mean that they may not be able to suspend properly. It is a good idea to test suspend on your computer to see if it does work before relying on it.