The Network Computing System (NCS) was an implementation of the Network Computing Architecture (NCA). It was created at Apollo Computer in the 1980s. It comprised a set of tools for implementing distributed software applications, or distributed computing.
The design and implementation of DCE/RPC, the remote procedure call mechanism in the Distributed Computing Environment, is based on NCA/NCS. It also was the first implementation of Universally unique identifiers.
References
Network Computing System Wikipedia(Text) CC BY-SA