Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.
Once powered on, the iPad rarely needs to be turned off. Instead, when you’re finished using it, press the power button once (without holding it) to put it into a low-powered sleep mode.
The iPad automatically goes to sleep after five minutes of inactivity to conserve battery power. You can change that amount in the Settings app by tapping General, then Auto-Lock, and tapping a time duration (1 to 5 minutes, or Never if you want to always put the iPad to sleep manually).
To wake the iPad, press the power button or the Home button and then use the Slide to Unlock control.
Apple’s Smart Covers were designed alongside the iPad 2: They interact with magnets built into the iPad’s case to align the cover and also provide a nifty sleep/wake feature. Open the Smart Cover to wake the iPad, or close the cover to put the iPad to sleep. (This feature is also available to other companies with cases that interact with the magnets in the same way.)