Exactly the same as any other version of Windows - to put the computer into a 'low power' state, but keep it energised for instant use by the operator.
Press the power button.
Start->Control Panel->Power Options->Hibernate->enable hibernation
The way I make my laptop hibernate is while on, briefly pressing the 'on' button for like second lightly. Hope that helps!
Hibernate, Standby
Hibernate saves all content of RAM to your hard drive. That allows to start your work from the point you left it before placing your computer in hibernation.
Start > Control Panel > Power Options
Right Click on the Desktop> Properties> Screen Savers> Monitor Power> Power> Hibernate
Fn + F12
If you're using Windows XP, you can enable this through the power options. Click on Start, then control panel, then power options. When the window pops up, you should see a tab that says 'hibernate'. Then, check the box that enables hibernate mode and click on. That should be it.
the graph of a quadratic function is a parabola. hope this helps xP
Windows XP Home & Windows XP Pro
Usually, the standby and hibernate options become inactive on Windows XP due to the system missing graphics drivers. Another possible reason is if these options are disabled in Control Panel.