How does D-Bus differ from DCE?
Start by reading Q:9. Distributed Computing Environment (DCE) is an industry-standard vendor-neutral standard that includes an IPC mechanism. The Open Group has released an implementation as open source software. DCE is quite capable, and includes a vast amount of functionality such as a distributed time service. As the name implies, DCE is intended for use in a large, multi-computer distributed application. D-Bus would not be well-suited for this.