Thank you Microsoft, you made my day

I wanted to have a closer look to the Enterprise Architectural Space which is used to organize patterns on patternshare.org.
So I decided to download the PDF version to read it on my powerbook.

I really laughed out loud when I saw the system requirements to view the PDF:

System Requirements
* Supported Operating Systems: Windows 2000, Windows Server 2003, Windows XP

So I now know the truth: All your PDFs are belong to Microsoft...
At least, Microsoft was kind enough to let me browse their site with Firefox...