It originated from the ArgoUML project, but massive changes were necessary in order to make ArgoUML into a commercial project; as a result the two efforts are very divergent.
Poseidon | UML | The Poseidon Adventure (1972 film) | The Poseidon Adventure | Beyond the Poseidon Adventure | UGM-73 Poseidon | TOPEX/Poseidon | Poseidon (film) | Poseidon Expeditions |