+** Extensible, programmable computing environment examples
+ :PROPERTIES:
+ :ID: c19c5a3b-dfb0-4f7f-961c-a387b925669f
+ :END:
++ [[https://www.johndcook.com/blog/2008/04/27/one-program-to-rule-them-all/][GNU Emacs]] - At the heart, Emacs is text editor on top of Lisp
+ runtime. Data storage and computation can be done in [[https://www.defmacro.org/ramblings/lisp.html][Lisp]]. Domain
+ specific languages to fit particular problem could be developed as
+ needed and Emacs extended to support those languages. Emacs provides
+ text buffers that can be used to build user interfaces.
+
++ [[https://www.eclipse.org/ide/][Eclipse IDE]] - In essence [[https://en.wikipedia.org/wiki/OSGi][OSGi]] platform with a text
+ editor. Computation done in java. Eclipse provides integration,
+ runtime and GUI platform.
+
++ [[https://en.wikipedia.org/wiki/IBM_Notes][IBM Notes/Domino]] - Custom database engine, software development
+ platform, GUI editor, computation can be done in Java and
+ LotusScript.
+
++ [[https://en.wikipedia.org/wiki/ABAP][SAP ABAP]] - Custom database engine, runtime, GUI platform,
+ development environment and programming language.