ICloudis a cloud computing service from Apple Inc, an online repository for contacts, calendars, mail, photos, and iTunes, all of which gets wirelessly pushed into your device. The content is thereby made accessible from iPad, iPhone, iPod touch, Mac, or PC.Icloud is a replacement for Apple’s MobileMe program and therefore acts as a data syncing centrewherein email, contacts, and calendars are kept up to date across all your devices.

Each account is said to have 5 GB of free storage, which does not get reduced with purchased music, apps and books and the Photo Stream service.When a user registers a new device, all iTunes content can be automatically downloaded.
Icloud Features:

• Photo Streaming is an interesting feature provided by iCloud. It sends photos taken on iOS devices or from iPhoto, and stores them on iCloud, where they are immediately downloaded to all other devices on the same account when they’re connected over Wi-Fi.
• iTunes in the cloud is another feature, wherein the music that is purchased in iTunes gets automatically downloaded to all your devices over Wi-Fi or over 3G, eliminating the need to sync it with your device. It also enables the user to download past iTunes purchases, where their past purchases can be accessed from the iTunes Store on your Mac, PC, iPhone, iPad, or iPod touch. Customers can scan and match tracks in their iTunes music library, including tracks copied from CDs or other sources, with tracks in the iTunes Store by using the iTunes Match feature.The songs that are available in your collection are determined and the matching ones are automatically added to your iCloud library.
• iCloudalso keeps your documents up to date across all your devices so that you don’t have to create or make edits to a document. This feature enables the user to create presentations and write reports from their iOS device, without bothering to save or manage them. These can instead be stored on iCloud, which in turn enables access to these documents along with the latest updates on whichever device you happen to be using at the time.
• iCloud stores your email, calendars, and contacts and automatically pushes them to all your devices. So you can switch from one device to another.

Requirements:

• iTunes 10.3 and iOS 4.3.3.
• Vista or Windows 7.
• Outlook 2010 or 2007 for for accessing contacts and calendars.