Wow, this brings back memories. When I was a kid I remember visiting a guy who had a barn full of computers in or around Princeton, N.J. There was a Burroughs 500, a PB 250, and a PDP-8. The 500 was a vacuum tube and nixie display machine. That sucker used a lot of neon, and I seem to remember that it used about $100 worth of electricity in 1960s dollars just to warm it up. I think that the PB 250 was one of the first machines built using transistors. I assume that all of you know what a PDP-8 is. I remember using the PDP-8 using SNAP (simple numeric arithmetic processor) to crank out my math homework. Note that the PB 250 also had SNAP, but in that case it was their assembler. Some of the first serious programming that I did was later at BTL on 516-TSS using FSNAP (floating-point SNAP) written by Heinz. Maybe he can fill us in on whether it was derived from SNAP. Anyway, I could only visit the place occasionally because it was far from home. Does anyone else out there know anything about it? It's a vague memory brought back by the mention of the 250. Jon

Jon, I found the documentation for SNAP and FSNAP which both ran on the DDP-516 multiprogramming operating system. Both documents were written in the summer/fall of 1970, and the FSNAP language is based on SNAP programming language, but I'm not sure if this SNAP language was the same as the one you used on the PDP-8. I'll send you the two documents in a separate email so you can tell if the two SNAP's are one and the same. We are talking 52 years ago now. Let's see if you can remember. Heinz P.S. Coincidentally I learned much of my system level programming on a PDP-8 computer during my student graduate days in the late 1960's. On 12/13/2022 9:14 AM, Jon Steinhart wrote: