Google search tips 21:31 Jan 15, 2010
"By attaching a + immediately before a word (remember, don't add a space after the +), you are telling Google to match that word precisely as you typed it."
In the first 10 pages of results returned by Google after searching for +CD, I don't see a single instance of a lower-case spelling in running text (i.e. not in a page title, URL, keywords etc.) that refers to a compact disc. A few of the hits refer to certificates of deposit or computer commands, so let's say that 0 out of 95 occurrences in that sample are in lower case and refer to compact discs.
Personally, I'd find that sort of ratio, combined with a glance in a reputable dictionary and perhaps another style guide or two for good measure, quite persuasive. |