superglaze writes "The biggest doubt cast over Android (whose SDK was released yesterday) has been the fact that much of it is licensed under Apache. There have been worries that manufacturers might fork the code road in a non-interoperable kind of way. I.e., they would have no obligation to feed back code to the wider Open Handset Alliance, or even tell the other members what alterations have been made. However, it turns out that Google made all the members sign a 'non-fragmentation agreement' to make sure everything works with everything. In theory at least. 'All of the partners have signed a non-fragmentation agreement saying they won't modify [the code] in non-compatible ways ... That is not to say that a company that is not part of the OHA could not do so.' Google's spokesperson highlighted the historical dangers of working with Java, the programming language that lies at the heart of Android. 'One of the current problems with mobile Java development is that Java has fragmented ... Java virtual machines have fragmented, but all the members of the OHA have agreed to use one virtual machine that can run script in Java'"