Where are the other 6 versions of Windows?

The e-mail Microsoft'a dropped on the soap, in one of the topics of which the competition for technical specialists was mentioned - www.itquiz.ru . It is proposed to answer questions about Windows 7, with the successful completion of the promise of prizes (15 sets for the preparation and examination of Microsoft, 25 boxes of Windows 7 Ultimate RTM, a special set of "spammer").

I was pleased with the first, comic test (clickable):