A versatile computer environment to manage instrumentation alignment and experimental control at the National Synchrotron Light Source beam lines has been developed. The system is based on a 386/486 personal computer running under a UNIX operating system with X11 Windows. It offers an ideal combination of capability, flexibility, compatibility, and cost- With a single personal computer, the beam line user can run a wide range of scattering and spectroscopy experiments using a multi-tasking data-collection program which can interact with CAMAC, GPEB and AT-Bus interfaces, and simultaneously examine and analyze data and communicate with remote network nodes.