Walt Mossberg of the Wall Street Journal explains it all very clearly from here.
Tuesday, 7 April 2009
In trying to work together with Sam Laryea today, I wanted to work on a spreadsheet together with him, because he had listed items from several documents alongside each other, and I wanted to show him how I intended to line things up so that we could use this as a basis for a paper we are working on. Normally, we would just sit together at the computer, but today we were in different locations. After a bit of browsing around the internet, I found this free software solution called Crossloop, which has to be installed on both machines. Then one person can invite the other to view their computer. Sam invited me in and straight away I could open Excel (on his machine and open the document he'd saved (because it was listed in recent documents). I could then move things around while talking with him through Skype, and we got to where we needed to be.
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