Max,

While I hate ugly, unnecessary neologisms as much as the next guy, this informatrix is under the impression that informatics is actually® a loan word - from the French, I think. It does fill a niche, if you want single word for computer science. It's also the word for such in Portuguese, and I'd wager it's used in other Latinate languages, as well. This is one case where they managed to lend us a word, in lieu of vice-versa .