Those who remember the legacy of the PDP-10, DEC-10 and DEC-20 might use this day, to consider what might have been, and what was, for this DEC product line. In the late 1970's I ran a KA-10, the oldest PDP-10, for a university's Artificial Intelligence department. But it was also used for general timesharing access, and many universities ran TOPS-10 and PDP-10 KA's and later KI's and KL's to service many many terminals. These were not small machines, they filled rooms. But a later KS-10 model was a microprogrammed version of the PDP-10 - it was only the size of a very large refrigerator. Compuserve used KS-10's as network controllers, and ran their own OS on 10's to provide their services. But DEC "choked" on developing 36-bit PDP-10 compatible workstations or desktops (some of those engineers went on to form Data General) and DEC produced the VAX line instead. The old PDP-10's were eventually taken out of commercial service; I don't know if any are running commercially today. It's hard to run one "privately" in a basement or garage, but someone likely fires something up in the winter. If anyone knows directly of a PDP-10 out there today, it would be nice to know of it. Happy DEC-10 day! Herb Johnson -- Herbert R. Johnson, New Jersey USA http://www.retrotechnology.com OR .net