> Your statement that IBM could sue company using a clean-room developed re-implementation of IMB's BIOS if IBM owned a copyright to their BIOS is incorrect as

> Your statement that IBM could sue company using a clean-room developed re-implementation of IMB's BIOS if IBM owned a copyright to their BIOS is incorrect as a matter of law. To the extent that it's relevant here, that appears to be untrue. This hinges on the fact that with an API, you have to match it exactly, and there's no reasonable way to argue that someone could sit down and do a clean room implementation of the Java APIs that perfectly matched all 3000 classes and all the public interfaces of all those classes. You can do a clean room implementation of the Java Platform, but you can't do a clean room design of the Java APIs. The whole point you're trying to solve is to make something that's compatible with Java, and that requires knowing the Java APIs, i.e., it's not a clean room. If we extrapolate that back to IBM and clones, as long as the clone makers must come up with the same external API as the IBM BIOS, then this court would say that IBM absolutely could use copyright law to prohibit clones, because the clones would have to have copied the APIs -- not the code, but the names and types used in the APIs themselves, and IBM holds copyright to those names.