Remote Desktop using Internet Connection instead of Network Connection?

So say if I left my laptop at home with an active internet connection and I was on the road with another laptop and it had a internet connection. Remember that the road laptop isn't on the same network as my home laptop. Is there anyway I can remotely access my home laptop remotely? They have different OSes.... show more So say if I left my laptop at home with an active internet connection and I was on the road with another laptop and it had a internet connection. Remember that the road laptop isn't on the same network as my home laptop. Is there anyway I can remotely access my home laptop remotely? They have different OSes. One has Mac OX 10.6.3 and the other has windows 7. I want to access my mac os at home through my windows 7 laptop on the road. Is it possible.
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