The document summarizes new features in Mac OS X Leopard, including updates to the Dock, Finder, Spaces, Spotlight, Mail, and other applications. The Dock now indicates active applications and folders can be displayed in different views. Spaces allows assigning applications to different desktops. Spotlight searches now include definitions, calculations, and Wikipedia links. Enhancements to Finder include Cover Flow, Quick Look previews, and options in the sidebar. Mail adds the ability to create notes, to-do lists, and download events from messages.