They have their mainframes, too. Not a big market, but highly lucrative, AFAIK. I read something about the mainframe division contributing 10% of their revenue but 25% of their profits.
It's kind of strange, though, they're not doing better in that department. I remember they launched a cloud-like offering around 2005, hosting customers' applications in multiple globally distributed data centers, with full redundancy, load balancing, etc. I suppose the world wasn't ready for that back then.