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| From https://www.mail-archive.com/simh@trailing-edge.com/msg08973.html
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| <pre>
| | * [[M/DSM-11/20200521]] |
| [Simh] MUMPS, MUMPS-11, DSM-11, ISM-11, etc | |
| Tom Morris Thu, 21 May 2020 18:12:53 -0700
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| On Thu, 21 May 2020 19:53:53 +0100, Paul Koning <paulkon...@comcast.net>
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| wrote:
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| > Along those lines: is there MUMPS-11 anywhere? That's nicely obscure.
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| > Another obscure one is CAPS-11, though that's probably far less
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| > interesting.
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| >
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| > MUMPS was a database system, apparently a very good one. It was used as
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| > the core for ASSIST-11, a telephone directory assistance database. In
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| > other words, the database that 411 operators would consult to answer
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| > your request for a phone number in a second or two. Database lookup in
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| > a million-record or so database, in around a second, on a PDP-11 in
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| > 1978. Nice.
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| MUMPS-11 integrated an operating system, database, and language interpreter
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| (for MUMPS, the MGH Utility Multiprogramming System). It was succeeded by
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| DSM-11 (Digital Standard MUMPS) and then Vax DSM. The core data structure
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| for MUMPS is a sparse array of arbitrary dimensions, so you could say
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| things like set user(80,"name", "last")="Bell" to write to the database
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| instead, just put a caret (^) in front set ^user(80,"name","first")="Gordon".
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| The database was implemented as a prefix-compressed B-tree which gave its
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| speed.
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| MUMPS-11 was a product of the Medical Systems Group (MSG) and the EMS email
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| system was written in DSM-11 by the neighbor Laboratory Data Products (LDP)
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| for their own internal use before it was adopted by corporate MIS. The
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| DECmail product was written in Vax DSM based on EMS, but rewritten from the
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| ground up, by Jerry Melnick and I.
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| As far as I know, the VA's electronic health record system STILL runs on
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| MUMPS. Local company InterSystems which was DEC's primary competitor in the
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| market with ISM-11. It is still owned by its founder, Terry Ragon, 42 years
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| later where he's done well enough that he was able to donate $200M to MGH
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| last year and another $100M in 2009 to establish the Ragon Institute. Not
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| bad! InterSystems has diversified, but I think their Caché database product
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| is still based on the original MUMPS database.
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| More than you ever wanted to know about MUMPS...
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| Tom
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| _______________________________________________
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| http://mailman.trailing-edge.com/mailman/listinfo/simh
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| </pre>
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