Learn how to use Apple's iCloud service to share your content across all your devices. This indispensable guide to Apple's iCloud service walks you through how to share songs, photos, books, apps, files, email, contacts, and calendars across your PC, Mac, and iOS devices. You will learn how to create and manage documents and edit them on any device, with iCloud keeping the files up to date. Find out how to back up important information via the cloud.