In business, laptops are essential to providing mobility to workers. Many business laptops spend much of their time in a desktop docking station and are always available to hit the road. In the home, laptops are most often purchased as a second PC. And now that laptops offer larger displays, longer battery power and speeds equal to desktop computers, some users have sworn off desktops altogether. This trend is likely to continue. The laptop makes a natural second PC. "Laptops For Dummies, 4th Edition" covers the many issues unique to laptops include synchronizing with the desktop, coordinating email pickup between two machines, remote access to the desktop, networking, power management, storage, and especially laptop security. The 4th Edition provides a general update to cover new technology, current processors available, and steps to update memory and hard drive capacities; includes more information on connectivity and communication; interfaces between laptops; add-ons; networking procedures; information specific to professionals working on the road; and more. The 4th Edition also features Windows 7 as well as other laptop-friendly operating systems.