  The current SLC control system was designed and constructed over 20 years
ago. Many of the technologies on which it was based are obsolete and difficult
to maintain. The VMS system that forms the core of the Control System is still
robust but third party applications are almost non-existent and its long-term
future is in doubt. The need for a Control System at SLAC that can support
experiments for the foreseeable future is not in doubt. The present B-Factory
or PEPII experiment is projected to run at least 10 years. An FEL laser of
unprecedented intensity plus an ongoing series of fixed target experiments is
also in our future. The Next Linear Collider or NLC may also be in our future
although somewhat farther distant in time. The NLC has performance requirements
an order of magnitude greater than anything we have built to date. In addition
to large numbers of IOCs and process variables, Physicists would like to
archive everything all the time. This makes the NLC Control System a bit like a
detector system as well. The NLC Control System will also need the rich suite
of accelerator applications that are available with the current SLC Control
System plus many more that are now only a glimmer in the eyes of Accelerator
Physicists. How can we migrate gradually away from the current SLC Control
System towards a design that will scale to the NLC while keeping everything
operating smoothly for the ongoing experiments?
