Apple's new Stacks technology provides one-click access to numerous items in folders right from the Dock, displaying a grid by default when too many items are present to produce a reasonable "fan" effect. The company's CoverFlow technology is built into the operating system, and works with Quick Look for browsing through documents and previewing their contents without launching the actual application that created them. Time Machine, as demonstrated by the guided tour released today, makes creating as well as restoring backups extremely simple for Mac owners who also haven external hard drive. The software appears to lift users up off the desktop, revealing a 3D view of the front most item in the Finder as it progressed throughout each backup on a given date. Apple Mail, meanwhile, integrates with iCal and includes a new technology to recognize dates, times, and contact information automatically. Leopard's iChat enables real-time backgrounds and special effects during video chats (only on faster Macs), and supports screen sharing to view as well as control another user's Mac (with authorization).