Will: I have a Varian 620 -100 series computer handbook which covers the 620/f-100 and 620 /L-100 machines. The computer was part of an FT-NMR spectrometer system. I still have the spectrometer, but the computer part is long gone. The manual is a small paperback, but it is packed with lots of technical information and specifications- just as the old manuals used to be. There is also a large box of binders that contain schematics for the spectrometer, and there may be some schematics for the computer mixed in with these. I know there are schematics for the computer/spectrometer control interface, because I had a student design a PC-based controller for this system a while ago and we needed this information to do it. Regards, At 04:13 PM 04/10/2000 -0600, you wrote: Kenneth L. Marshall Research Engineer, Optical Materials Laboratory for Laser Energetics University of Rochester 250 East River Road Rochester, NY 14623 Phone:(716)-275-8247 Fax: (716)-275-5960