Yes, they are brother and sister - my older brother was in about the same year as Tony at primary school in Stechford, Birmingham
By "commercially available" I'm assuming you mean "publicly available" as the web isn't - at heart - a commercial entity. The answer is: http://nxoc01.cern.ch/hypertext/WWW/TheProject.html and it...
1dvd formatt is avalible and that is dvd
YES IT IS
the first cell phone commercially available in the United States was in 1984.