Apple is somewhat notorious for omitting articles when talking about their products, and statements such as "People love iPhone" hit my ear a little strangely. But when I stopped to think about it, I realized that I wouldn't say "the Windows" or "the iWork".
I couldn't come up with a reason that I use the definite article before some product names and not others. Is there some sort of convention (probably not a hard-and-fast rule) for usage here?