One of the reasons beyond cost that Linux is finding a place on desktops is the simple fact that Linux can run on desktop and laptop machines that Windows simply cannot hope to run on – Windows XP needs a 1GHz 512MB in memory machine to run 2-3 apps well together. And Windows new Vista really needs a 1.5GHz dual core machine with 2GB of memory. So there is a growing hoard of older desktops and laptops in organizations that still can be very useful for their ability to connect to the Web, run eMail, and the free and easy to use Open Office word processing, spreadsheet, database and presentation software (which can save to all of the Office file formats including the new Office 2007 OpenXML format – see Novell Suse Linux for details).
So organizations with perpetually pinched budgets can rescue those no-longer-Windows capable machines and put them to good use. Here is an article which shows the broad range of Linux distros that are available:
and starts to sort out which are most appropriate office use and why. This is an excellent article on a site that is an excellent resource for getting more out of your desktops with the help of Linux.