Take a look at the next desktop PC or laptop you come across. Odds are good it won't be running an open-source operating system. Microsoft's closed-source Windows has by far the highest share of the PC client operating system market, followed in a distant second by Apple's Mac OS X. Linux and other wholly open source operating systems have only a tiny market share.It's not hard to see why. Despite the advances made by distributions such as Ubuntu, desktop Linux is still miles behind Windows and OS X in terms of the look, the feel and the slickness that most office workers have come to expect. The vast majority of companies simply aren't prepared to make office workers use an open source OS - and most office workers aren't prepared to use them, either.Even if you want to stick with a closed source operating system (or, the case of OS X, partially closed source), your business can still take advantage of a vast amount of open source software. The most attractive benefit of doing so: It's genera