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Around 1988-1990 I worked for a company that was using an old RSX-11M system to host an ERP application. The application used a third-party database product of which I am trying to recall the name. This was a hierarchical/navigational type of database (not relational). The system had been in-use for some years prior to 1988, was becoming obsolete at that point, although the database product was still supported by the vendor - they were still offering training on their product.

What database product(s) would have been available which would meet these criteria:

  • Existed for some years prior to 1988, vendor (third-party, not DEC) still in business and supporting the product at that time (1989-ish)
  • Hierarchical/navigational (non-relational) database engine i.e. records used links/pointers to define data relationships
  • Available on RSX-11M
  • Vendor provided training out of their office in Eastern Virginia (Reston?)
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    Was it MUMPS? en.wikipedia.org/wiki/MUMPS
    – mannaggia
    Commented Apr 20 at 1:11
  • DEC had the CODASYL dbms, and I’m pretty sure it also ran on RSX-11.
    – RonJohn
    Commented Apr 20 at 14:47
  • @mannaggia No. I've seen that name before, many years ago, but that was not the product I was working with.
    – Anthony X
    Commented Apr 20 at 14:48
  • @RonJohn It was a third-party product, not DEC.
    – Anthony X
    Commented Apr 20 at 14:49
  • DEC had Datatrieve on verious operating systems. RSX-11M may have been one of them. Datatrieve was not a datamanagement system. It used underlying facilities like RMS to actually access the Data. It had a good data manipulation language somewhat like SQL and a good report generator built in. Datatrieve was closer to relational than to hierachical in its constructs. There was a CODASYL DBMS on the PDP-10 and the VAX, and I'm guessing there was one on RSX. Commented Apr 22 at 13:38

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