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# GPL MUMPS by Example
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**MUMPS** ("Massachusetts General Hospital Utility Multi-Programming System"), or **M** , is a general-purpose computer programming language originally designed in 1966 for the healthcare industry. 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. [Read more... ](https://en.wikipedia.org/wiki/MUMPS )
The implementations currently available are:
- [Intersystems (Caché) ](http://www.intersystems.com/ )
- [FIS (GT.M) ](http://www.fisglobal.com/products-technologyplatforms-gtm )
- [MUMPS Database and Language by Ray Newman ](http://sourceforge.net/projects/mumps/ )
- [Open Mumps ](http://www.cs.uni.edu/~okane/ )
The examples in this tutorial are run with GPL Mumps.
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## Prerequisites
- [The Mumps Programming Language ](https://www.cs.uni.edu/~okane/ )
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- [Mumps Language Users' Guide ](https://www.cs.uni.edu/~okane/source/MUMPS-MDH/ReadMe.pdf )
- [Mumps Language Quick Introduction & Tutorial ](https://www.cs.uni.edu/~okane/source/MUMPS-MDH/MumpsTutorial.pdf )
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## Quick Setup
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Download the open source distribution of the [Mumps interpreter ](https://www.cs.uni.edu/~okane/source/MUMPS-MDH/mumps-18.02.src.tar.gz ) and run the following commands:
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tar -zxvf mumps-18.02.src.tar.gz
cd mumpsc
sudo ./ConfigureNative.script
sudo ./BuildMumpsWithGlobalsInSingleUserNative.script
The resulting interpreter is located in `/usr/bin/mumps` .
$ mumps
Mumps 17.30; Built: 16:05:53 Sep 23 2019
Float: double; DBMS: Native Stand Alone; Hardware math: yes; Int: int; Float digits: 6; Cache: 33; Block: 2048; FP Bits: N/A
http://threadsafebooks.com/
Enter HALT to exit
> write "Hello world"
Hello world
> halt
EOF - goodbye ...
## 1. The Very Basics
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### [`hello-world.mps`](https://github.com/programarivm/gpl-mumps-by-example/blob/master/01-the-very-basics/hello-world.mps)
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$ mumps 01-the-very-basics/hello-world.mps
Hello world
---
### Contributions
Would you help make this tutorial better? Contributions are welcome.
- Feel free to send a pull request
- Drop an email at info@programarivm.com with the subject "Open MUMPS by Example"
- Leave me a comment on [Twitter ](https://twitter.com/programarivm )
- Say hello on [Google+ ](https://plus.google.com/+Programarivm )
Many thanks.
