Chip wrote:
"I still have my PDP 10 programming manual."

As I recall from circa 1970, the Digital Equipment tiny-biny was the
programmable data processor, PDP 8. I remember Schlumberger having in
its Houston Headquarters a PDP 10, The PDP 10 was a rather large number
cruncher which could be used for scientific purposes as well as for
business applications. I think they ran both FORTRAN and COBOL.

My employer tried Raytheon 704`s for minicomputers, then switched to
Digital Equipment VAX machines. They worked well.

Best regards, Richard Harrison, KB5WZI