I got a Varian(Univac) Data Machines 620L100 in very good conditions including a fixed-head disk, a teletype and a Tektronix storage display. This machines is dated to 1974. -- Is it an ADAPTS system (is there an A/D panel just below the CPU) ? I have one. It is very likely that there is a lab oriented BASIC (possibly still in core!) If there is any way to save the contents of memory before you fiddle with trying programs, it would be a GOOD THING. I haven't touched my machine because I don't want to destroy what may be the only copy of that program. I would also suggest not spinning up the disc right away. I assume you aren't getting any documentation or external software with it?