The cost to own a Windows based PS is nebulous at best as Microsoft regularly offers newer version of their Windows operating System and their Office Suite for word processing, spreadsheets and presentation software in Word, Excel and Power Point. These regular major upgrades typically require an upgrade in hardware and the purchase of a flavor of the new product. Both Micorsoft and Adobe could learn something from software developer Intuit who's Quick Books and Quicken products seemed to have the most reasonable upgrade pricing. While Microsoft's dominance is troubling to many and others just accept their products in lemming-like fashion, there are alternatives that are compatible with Microsoft Office documents. Since there is a good chance you will get a Word doc, Excel file or Power Point presentation as an email attachment, it will be difficult to completely unplug form the Microsoft grid.
My departure from the Widows based Operation System challenged me to see if I could leave MS Office dependence. Five months prior to leaving the Windows OS, I have broke completely with Microsoft's Outlook and dove into gmail usage full time. I knew that after five months of being Outlook free, that I could do the same over the rest of the Office Suite if I could deal with the occasional MS Office attachments that come to my email. Being a Adobe Acrobat user it is far more advantageous to convert all files to PDFs that will be attached to emails, but the cost of Acrobat and the fact
that most users are not willing to go past the free offering in Acrobat Reader, MS Office docs will be attached to email docs for a while to come.

My solution to dumping MS Office completely came in three forms.
- My first option was to use Google Docs. However the formating really did not hold up as well as I needed.
- My second option was just to use Apple's iWork. While iWork is fine 80% of the time it seems that MS Office docs I tend to share with others has very complex formating. Many of the documents I deal with are forms and files with a TOC, tables and footnotes. There are times it just does not work with iWork to my satisfaction.
- Last comes OpenOffice.org This is a free suite owned by Sun, it works on many different Operating Systems including Windows and allows me to open Word, Excel and Powerpoint files. So far it looks like the docs I get hold up well with this software and allow me to share those files without worry. While I still use iWork the majority of the time, I now have open office as a backup with the few trouble some MS Office docs that are sent my way.
Just to side track everyone a little on the Windows side, there is a free PDF printer driver that will allow you to turn any document on your Windows PC that you can send to your printer. It will allow you to combine several different files into one PDF file as well. That is the Bullzip free software.
If you are tired of the expensive upgrading of MS OFfice or have moved to a different operating system and want to break ties with Microsoft, products like OpenOffice.org are providing an opportunity.