iOS devices have only a few buttons:

The Sleep/Wake Button is found on the top of the device. The Home Button is found on the bottom, center, of the device.

Lock iPad: Press the Sleep/Wake button.
Unlock iPad: Press the Home button or the Sleep/Wake button, then drag the slider.
Turn iPad off: Hold down the Sleep/Wake button for a few seconds until the red slider appears, then drag the onscreen slider.
Turn iPad: on Hold down the Sleep/Wake button until the Apple logo appears.

If you don’t touch the screen for a minute or two, iPad locks automatically. You can change how long it takes the screen to lock, or set a passcode to unlock iPad.
Set the Auto-Lock time: In Settings, go to General > Auto-Lock, then set a time for iPad to lock automatically.
Set a passcode: In Settings, go to General > Passcode Lock, then tap On or Off.

The Home button lets you get back to the Home screen at any time. It also provides other convenient shortcuts.
Go to the Home screen: Press the Home button.
Display the multitasking bar to see recently used apps:When iPad is unlocked, double-click the Home button.
Display audio playback controls When iPad is locked: Double-click the Home button.

The iOS home screen holds shortcuts to all of your applications. You can have as many screens as you like, holding many applications and folders.
To move a shortcut: Simply tap and hold it, then, once the icon starts shaking, drag it to where you'd like it and hit the home button.
To uninstall an application: Click and hold on a shortcut and click the X that appears above it.
To create a folder: simply move a shortcut on top of another, iOS should name the two if they're similar; if you want to name it something else, simply tap the title and change it.

Return to the Home screen: Pinch four or five fingers together.
Reveal the multitasking bar: Swipe up with four or five fingers.
Switch apps: Swipe left or right with four or five fingers.
Turn multitasking gestures on or off: In Settings, go to > General > Multitasking Gestures, then tap On or Off.
Zooming in or out: Pinch two fingers together or apart.

You can set iTunes to sync music, photos, video, podcasts, apps, and more. For detailed information about syncing iPad with a computer, open iTunes then select iTunes Help from the Help menu.

There are several downloadable office suites to be found on the app store. SlideShark, Documents to go, Google Docs and Keynote each have their own adavantages.

To connect an iPad or iPhone to a monitor or projector, you'll need an Apple Dock to either VGA or HDMI connector.