Originally posted by: Nothinman
Switching to Linux is unbelievably expensive because you need to retrain everybody in the company.
The same goes for switching to Vista and Office 2K7.
Windows and Office fundamentally do not change.
Win 95, 98, NT, 2000, ME, XP, and Vista all have the same basic file system, typically install program links to the Start Menu, have the same basic options on the top left of the window (things like File, Edit, View), have the same commands (alt tab, windows D, windows M, alt F4, ctrl alt del), and have the same install procedures (double click then hit next until it leaves you alone).
MS Office basically has not changed since Office 95. Excel has the same formula setup (=sum(A5

10)), Powerpoint is the exact same except for some new effects and improved clip art, Outlook is basically the same, Word is the same.
At my work we have some computers that use Windows 2000 Pro with Office 2000, and some use Windows XP Pro with Office 2003. All of the computers have the exact same setup. You can log into Citrix using either system. You can fetch your mail using either version of Outlook, and both versions share the same contact lists and folder setup (because both log into the same MS Exchange server). Either setup can run any of the lab instruments and printers. The Word and Excel documents we have can be created and edited with either version of Office and they're 100% interchangable; we've never had a compatibility issue between Office 2000 and Office 2003.
Linux is a bit different. KDE and Gnome are similar to Windows but not quite the same, so things like File and View are a tad different. Install procedures are totally different. The file system is completely different (where my Program Files at?). Networking is very different, but it's probably easy enough to poke your way around once the network is configured properly (I'm not sure because I could never get it to work). The way of logging in is extremely different; no more 3-finger salute, here you login then type "startx". Companies can't use a friendly login screen where you select your name because there could be literally thousands of names to sort through, and it's a security issue to make all the user names publicly known.
Open Office is similar to MS Office but it has enough differences that it would take a while to get used to, either by organized training or by poking around for a while, depending on which one is more economical. If everything is on a strict time budget, there isn't time to "poke around", so this training must be done through training sessions.