[1]: http://xkcd.com/657/
[2]: http://xkcd.com/980/
[3]: http://xkcd.com/887/
[1]: http://xkcd.com/657/
[2]: http://xkcd.com/980/
[3]: http://xkcd.com/887/
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* location (getting surprisingly specific sometimes)
* browser
* what plugins work/don't work in your browser
* referrer (what you clicked on to arrive at the comic)
* operating system
* screen size
* browser window size
* hostname domain (i.e. you're at work, and your company's domain)
* hostname TLD (i.e. your computer's ISP is .net, .mil, etc)
Here are different compilations of the variations he created:
http://www.explainxkcd.com/wiki/index.php?title=1037:_Umwelt
I'm not nitpicking, just helping demonstrate how far Randall went in that creation.
How'd he do that?
Also, it's a very cheap shot to get nerds, as every nerd is found of this. This is the characteristic in writing/playing RPG stories that i like the most. Thinking of the backstory for every single little thing.