iCloud is the newest brand name of Apple's cloud computing services. Previously, this service has been branded as iTools in 2000, .Mac in 2002, and MobileMe in 2008 by Apple.

iCloud is a cloud-based system that allows users to store music, photos, applications, documents, bookmarks, reminders, notes, iBooks, and contacts, as well as it serves as a platform for Apple's email servers and calendars. It controls links to uploaded content and runs on Microsoft and Amazon services.

iCloud is much extra than a hard disk in the sky which makes quick and effortless access to everything on the devices you use each day. You content is involuntarily and securely stored by the iCloud, which makes it available for your iPhone, iPad, iPod touch, Mac or PC always. It gives you access to your music, applications, recent photos, and more from any other device you use. Your email, contacts and calendars are kept updated across all devices. There is no synchronization and no management is required. 

All new updated devices (iPhone, iPad and iPod with iOS5 and Mac with OS X Lion) are ready for iCloud to use. 

It is easy to use, and setting it up on your device is no exception. It requires only few steps to be followed before all your vital possessions is up to date on your iPhone, iPad, iPod touch, Mac, and PC

When you register to iCloud, you automatically get 5 GB of Free Storage. And that's a lot of space as the way iCloud stores the content. Your purchased music, iPhone applications, books and television programs, and the Photo gallery, do not count toward your free storage space, adding to your benefits. As your mail, documents, Camera Roll, account information, settings and data from another application does not require much space, 5GB will prove to be a great space for you. And if you need more storage space, you can purchase a storage upgrade from device.

Whenever you upgrade device, your preferred and most loved apps will get seamlessly integrated with iCloud. And so all your content and information will be up to date and is available on every device you use.