"It’s interesting to note that the distribution differs from the the traditional pattern used in the English lanuage: E,T,A,I,O,N,S,H,R,D,L … Some of this can be explained by the fact that domain names are not just for the consumption of English speaking people. Even though other regions have their own domains, since .com has become the lingua franca, many businesses simply default to .com (For those interested, there is an interesting article on Wikipedia about the differing relative frequencies of letters in other languages)."<p>That may be part of it, but the author doesn’t recognize at all the likelihood the letter I is used more frequently probably due to Apple’s product naming influence, imitation from other companies pre-pending the letter before their prouducts and services, and the fact that ‘I’ is a strong, powerful pronoun.