<language> Donald Knuth's self-documenting literate programming, with algorithms and documentation intermixed in one file. They can be separated using Weave and Tangle. Versions exist for Pascal and C. Spiderweb can be used to create versions for other languages. FunnelWeb is a production-quality literate-programming tool.
["Literate Programming", D.E. Knuth, Computer J 27(2):97-111, May 1984].