There are two possibilities, either you create a door for yourself, or if you see a door, then just open it and walk in. We will talk about the door thing later, first tell me: what do you use for your computing? Did I hear Microsoft Windows? GNU/Linux? Some might be using Apple Mac as well.
Windows is passe nobody seems to be talking about it any more. Except for Microsoft, and even they may shy away if you say something that sounds similar to 'Vista'. Now, the rage is Mac and GNU/Linux.
Apple Mac has increased its share in the market post Vista release. The market was there and Vista disappointed people. GNU/Linux is fighting but, it has more yards to cover.
rest here