ADA - a very complex but powerful compiler language

Used also for military purposes ...

:... but that's comparable to using knifes to kill someone vs cut tomatoes with it, you can do many things with the same object !

ADA was developed in the 1970s, the U.S. Dept. of Defense was looking for a more powerful programming language and their new development were influenced by PASCAL also (so source code looks a bit like a Pascal source code).
There were not many ADA implementations for CP/M available, but at least the Janus ADA compiler was really usable.

To get a deeper knowledge of details of the history, please visit the Wikipedia entry here.

Here are some links to get in touch with the "real" stuff:

SuperSoft (Maranatha) ADA Compiler 2.1 can be found here or as a single zip file here, a scanned manual is located here

RR Software's Janus ADA 1.50 Compiler is located here or here

A comparison can be found here (thanks to atarimagazines.com), or locally mirrored as RTF file.

Today it is possible to use a more modern version (ADA 95) for free. Just take a look at the GNU ADA Project page or here at libre.adacore.com.

Also, Aonix has released a limited, but free version of their commercial product, more infos can be found at their website.