Recall Dropbox (for all mobile devices and all computers)
Dropbox allows users to create a special folder on each of
their computers, which Dropbox then synchronizes so that it
appears to be the same folder (with the same contents)
regardless of which computer is used to view it. Files
placed in this folder also are accessible through a website
and mobile phone applications.
iCloud stores your content and wirelessly pushes it to all
your devices. Everywhere. Automatically. That's the way it
should be, and iCloud makes it a reality. So when you buy a
song, you don't have to download it over and over to enjoy
it on multiple devices. Or worry that a document doesn't
contain your latest revisions. Or spend time transferring
photos. iCloud takes care of everything for you. Just like
Apple ID Support
An Apple ID is the login you use for just about everything
you do with Apple, including using iCloud to store your
content, downloading apps from the App Store, and buying
songs, movies, and TV shows from the iTunes Store.
Just One Apple ID and Password -- on all your Apple Products
Reset (Forgotten) Apple ID Password
On iOS Settings > Apple ID, iCloud, iTunes & App Store > Password & Security > Change Password.
Once an Apple ID password is changed, one has to enter the
new password on all your Apple devices, including Macs,
(often multiple times).
Reporting a lost or stolen Apple product
Install Find My iPhone (or iPad, iPod or Mac)
Demo Find My iPhone (or iPad, iPod or Mac)
Demo iCloud Setting
Contacts (from iPad User Guide)