As was expected by many, U.S. District Judge Thomas Penfield Jackson has ruled that Microsoft is a monopoly and that it violated antitrust laws (here's the story on ZDNet). The ruling orders Microsoft to split into two companies, one that sells operating systems and another that sells applications. Naturally the company is appealing, which makes an additional ruling particularly interesting, as it says Microsoft must, "disclose some internal APIs and other technology -- until the appeals process is finished." Analysts are calling this the largest breakup since AT&T, and it could have serious implications for everything from games to web browsers and office software.