Hi!
I'm not sure how plausible this is, but here goes. The Internet started up as something in DARPA, right? Something military or defense-related, if I remember correctly? Suppose the government manages to classify Internet technology as a military secret and prohibits its export outside of the US (and limits its distribution inside the US). We'd wind up with a world with very little Internet outside the military, and almost none outside the US.
How would things have turned out? Assume computer technology development in fields outside the Internet remains the same (and Internet development remains the same inside military circles).
ACG