Apple previewed 10 features of the upcoming OS X Leopard at the WWDC 06.
The Time Machine dubbed backup and versioning feature is sure one of the more impressive features. Other highlights are the 64-bit Application support, improved iChat, improved Dashboard, Spaces (multiple desktops), Spotlight (enhanced with network search) and mail enhancements (to-do's, stationery, notes).
Apple OS X Leopard will ship Spring 2007.More details on the OS X Leopard preview site - cool site that demos all new features of Leopard with screenshots.
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