MUMPS - Programming language

MUMPS is a programming language created in 1966 by Neil Pappalardo.

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MUMPS (Massachusetts General Hospital Utility Multi-Programming System), or M, is a general-purpose computer programming language that provides ACID (Atomic, Consistent, Isolated, and Durable) transaction processing. Its differentiating feature is its "built-in" database, enabling high-level access to disk storage using simple symbolic program variables and subscripted arrays, similar to the variables used by most languages to access main memory. The M database is a key-value database engine optimized for high-throughput transaction processing. Read more on Wikipedia...

MUMPS Wikipedia page
MUMPS docs
There are at least 2,448 MUMPS repos on GitHub
MUMPS first developed in MUMPS Development Committee
file extensions for MUMPS include mumps and m
The Google BigQuery Public Dataset GitHub snapshot shows 4k users using MUMPS in 5k repos on GitHub
There are 38 Project Euler users using MUMPS
Explore MUMPS snippets on Rosetta Code
MUMPS on HOPL
MUMPS appears in the TIOBE Index
ANTLR grammar for MUMPS
CodeMirror package for syntax highlighting MUMPS
See also: (8 related languages)JOSS, Unix, TELCOMP, Meditech Interpretive Information System, Linux, Tiny BASIC, ASCII, CSV

Example from the web:

label1 ; This is a label
    write "Hello World !",!
    quit

Example from Riju:

main()
  write "Hello, world!",!
  quit

Example from hello-world:

 w "Hello World",!

Example from the Hello World Collection:

; Hello World in Mumps-M
 w !,"Hello World"

Example from Wikipedia:

GTM>S n=""
GTM>S n=$order(^nodex(n))
GTM>zwr n
n=" building"
GTM>S n=$order(^nodex(n))
GTM>zwr n
n=" name:gd"
GTM>S n=$order(^nodex(n))
GTM>zwr n
n="%kml:guid"