Literate Programming with Emacs and Org-mode

"Literate programming is a methodology that combines a programming language with a documentation language, thereby making programs more robust, more portable, more easily maintained, and arguably more fun to write than programs that are written only in a high-level language. The main idea is to treat a program as a piece of literature, addressed to human beings rather than to a computer. The program is also viewed as a hypertext document, rather like the World Wide Web."  (Knuth) This approach also underlies Jupyter notebooks, which allow data scientists to explore data while keeping a notebook of their ideas and intermediate results open as a basis for publication and sharing. The name "Jupyter" comes from three popular interpreted languages, Julia, Python, and R. Many kernels are now available for compiled languages, too, to add REPL functionality. In Emacs + Org-mode you can run any number of kernels in the same Org-mode file.