These are the base sources and documents for version 2.12 of ``noweb'', a simple, extensible literate-programming tool. noweb is available from https://github.com/nrnrnr/noweb. The file INSTALL tells how to build noweb. The file FAQ answers some frequently asked questions about building and using noweb. STRUCTURE OF THE BASE SOURCES This part of the distribution contains the following directories: awk pipeline stages and back ends in awk and sh src C source code for nt, markup, and finduses icon pipeline stages and back ends in Icon lib other pipeline stages and back ends, not available in Icon rc replacements for shell scripts; useful on Plan 9 shell the shell scripts that make up the actual commands tex supporting tex code for /usr/local/lib/tex/macros xdoc man pages, hacker's guide (named to be unpacked last)