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Operation Cycle

1. Lecturer starts local system.
2. Participants start local systems registering themselves at the lecturer's system.
3. Multicasting of notebook.
4. Iterations of:
   1. Controlled Operation.
   2. Optionally one of the following:
      • Independent operation (optional retrieval of result notebooks).
      • Temporary transfer of control (optional storing of result notebook).
   3. Multicasting of notebook.
5. Termination of session.

What about latecomers?