Apple just released Mac OS X Lion\u00a0which, by the way, is already available for download.\u00a0 The cheap $29.99 upgrade fee is enough to convince current\u00a0Mac users\u00a0to upgrade to the new OS but if you want to know what you will get if you choose to upgrade, I've listed here its 10 main\u00a0features. Multi-Touch Gestures Multi-Touch gestures have been enhanced in the new Mac OS.\u00a0 It is now more intuitive and direct. \u00a0Apple has implemented more fluid gesture responses, including rubber-band scrolling, page and image zoom, and\u00a0full-screen\u00a0swiping. Full-Screen Apps\u00a0 One of the best features of Mac OS X Lion is systemwide support for full-screen apps.\u00a0 Now you can use every inch of your screen\u2019s real estate. It supports multiple full-screen apps and Apple has made it easy to switch between full-screen and desktop views. Mission Control Mission Control is sort of a bird\u2019s-eye view of everything on your system.\u00a0 It shows full-screen apps, Dashboard, Expos\u00e9, and Spaces. \u00a0With a single swipe on the trackpad, your desktop zooms out to Mission Control. Mac App Store\u00a0 Apple brought the App Store concept to the Mac OS X Lion.\u00a0 With Mac\u00a0App\u00a0Store, you can browse and download free and paid apps. \u00a0New apps install to Launchpad and the Mac App Store informs you when updates are available. Launchpad\u00a0 All your apps in your Mac are in Launchpad. \u00a0It gives you easy access to the app you need with just one click. \u00a0You can arrange your apps, group them together in folders, or delete them using Launchpad. Resume\u00a0 Resume is a very useful feature.\u00a0 It lets you restart your Mac and return to what you were doing. \u00a0The apps you close will reopen right where you left off. Auto Save\u00a0 Another useful new feature is Autosave.\u00a0 It saves your work automatically so you don\u2019t have to worry about saving your work at every step. Versions\u00a0 This feature is a heaven sent.\u00a0 Apple knows how hard it is to keep multiple versions of your work and get lost in the process.\u00a0 Mac OS X Lion does everything for you wonderfully. Versions charts the history of your documents, taking snapshots in time, and displaying them side by side with the latest versions. \u00a0You can restore a previous version, or copy and paste from old versions to new ones. Simply beautiful. AirDrop\u00a0 Sharing files wirelessly without Wi-Fi? That\u2019s possible now with AirDrop.\u00a0 It allows you to send files to anyone around you wirelessly without need for a Wi-Fi network. \u00a0You just need to click the AirDrop icon and your Mac searches for AirDrop users within about 30 feet of you. \u00a0To share a file, you just drag and drop. Mail\u00a0 The best feature of the new Mail (Version 5) is Conversations.\u00a0 It presents messages from the same thread in a timeline showing each communication as it was sent while hiding redundant text. \u00a0\u00a0You can also view your mail in widescreen view featuring a full-height message and a message list that includes snippets.