I think this is a song about fate. How he falls in love with a girl, and he believes she's the one, because she could have been any where that day and not actually met him. If she hadn't have ever "read the computer magazine to know [she] likes computers, to go to the computer show to see [him] standing there" they would have never met. It could also be about how even the smallest actions impact our lives in the biggest of ways.
I think this is a song about fate. How he falls in love with a girl, and he believes she's the one, because she could have been any where that day and not actually met him. If she hadn't have ever "read the computer magazine to know [she] likes computers, to go to the computer show to see [him] standing there" they would have never met. It could also be about how even the smallest actions impact our lives in the biggest of ways.