All of the built-in apps on iPad were designed from the ground up to
take advantage of the large, Multi-Touch screen. And they’ll work in
any orientation. So you can do things with these apps you can’t do on
any other device.
Here are some of the features of iPad.
- Safari
- Mail
- Photos
- Video
- YouTube
- iPod
- iTunes
- Apple Store
- iBooks
- Maps
- Notes
- Calendar
- Contacts
See more details here.. 
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