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“Sales of Apple’s Macintosh computers have been growing much faster than PC sales overall, with many new Mac buyers switching from years of using Windows computers,” admits Walt Mossberg (allthingsd.com). And to help those who have made the switch, he’s assembled “a quick tip sheet explaining a few of the most common differences” between Mac OS Leopard and Windows.

Aperture 2: Professionally Manage Digital Photographs, a new title from Ben Long, Richard Harrington, and Orlando Luna, guides you step-by-step through the entire Aperture workflow, even providing hundreds of sample images to experiment with. Download the free Aperture 2 trial, work through the book’s in-depth tutorials, and you’ll see how far Aperture 2 can advance your photography.

Of three ultrathin portables — MacBook Air, Toshiba Portege, and Lenovo ThinkPad — which is the most usable? To find out, Computerworld turned to usability experts and 20 impartial testers. Those testers, David Haskin relates, found MacBook Air the most usable, the most fun, and the best value of the three. In fact, they made MacBook Air “the clear winner when asked which laptop they’d purchase.”

When open windows start piling up on your desktop, Mac OS X Leopard provides a great way to establish control. Spaces. How can Spaces help you get more organized? Find out by reading the latest Pro Tip of the Week.

Thanks to a new educational initiative, teachers and parents can now access a wealth of K-12 educational curricula on iTunes U. Delivered by state and district agencies in Arizona, Florida, Maine, Florida, New Jersey, Pennsylvania, and Utah, the free content provides “global access to educational content, curricula, learning materials, news, best practices, and other resources,” reports Dave Nagel (thejournal.com).