Functional levels
One can download Microsoft Publisher for Windows 7 on the Microsoft Windows website. The website has different versions of Publisher available for purchase and download, including archived older versions.
Different versions of Windows may be downloaded at the Microsoft downloads website. Alternatively you may look on the Cnet website for available Windows downloads.
A full list of the successive versions of the Windows software is available on Wikipedia... See related link.
Windows has offered many versions of its server software. The newest version, Windows Server 2012 is available on the Microsoft website's download page.
All versions of Excel should work with all versions of Windows.
All versions of Windows to this day is created by Microsoft.
All versions of Windows to-date have been made by Microsoft.
Unfortunately, Windows XP is no longer available on the Microsoft website to purchase. Other versions of Windows such as Windows 8 are available and the payment options on the Microsoft Site are credit card, pre-paid subscription card and Direct debit. If you are happy to shop elsewhere for Windows XP, Amazon still stock the software.
No! It was featured on Microsoft Windows 95, and later on other versions of Microsoft Windows (particularly Windows 98, Windows ME, and Windows XP). This feature was later used on any form of online services like Microsoft's own Internet Explorer on almost any version of Microsoft Windows.
All versions of Microsoft Office (with the exception of those created for Macinthoshes) up to and including Office XP are compatible with Windows 98.
There are versions of the FireFox browser available for the Linux, Mac OS X and Windows operating systems.
Windows, in all its versions, is developed my the Microsoft Corporation.