GLOSSARY ---- Developing the Ledger software uses a number different tools, not all of which will be familiar to all developers. [**Boost**](http://www.boost.org): a standard set of C++ libraries. Most Boost libraries consist of inline functions and templates in header files. [**Cheetah**](http://www.cheetahtemplate.org): a Python templating engine, used by *./python/server.py*. [**CMake**](http://www.cmake.org): A cross platform system for building from source code. It uses the *CMakeLists.txt* files. [**DOxygen**](http://doxygen.org): generates programming documentation from source code files. Primarly used on C++ sources, but works on all. Uses the *doc/Doxyfile.in* file. [**GCC**](http://gcc.gnu.org): Gnu Compiler Collection, which includes the *gcc* compiler and *gcov* coverage/profiler tool. [**GMP**](https://gmplib.org): Gnu Multiple Precision Arithmetic Library provides arbitrary precision math. [**Markdown**](https://daringfireball.net/projects/markdown/): A typesetter format that produces *html* files from *.md* files. Note that GitHub automatically renders *.md* files. [**sha1**](http://en.wikipedia.org/wiki/SHA-1): a marginally secure cryptographic hash function, used only for signing the license file. [**Texinfo**](http://www.gnu.org/software/texinfo/): Gnu documentation typesetter that produces *html* and *pdf* files from the *doc/\*.texi* files. [**Travis CI**](https://travis-ci.org): a hosted continuous integration service that builds and runs tests each commit posted to GitHub. Each build creates a [log](https://travis-ci.org/ledger/ledger), updates a [small graphic](https://travis-ci.org/ledger/ledger.png?branch=master) at the top left of the main project's [README.md](https://github.com/ledger/ledger/blob/master/README.md), and emails the author of the commit if any tests fail. [**utfcpp**](http://utfcpp.sourceforge.net): a library for handling utf-8 in a variety of C++ versions. Orientation --- The source tree can be confusing to a new developer. Here is a selective orientation: **./acprep**: a custom thousand-line script to install dependencies, grab updates, and build. It also creates *\*.cmake*, *./CmakeFiles/* and other CMake temporary files. Use *./acprep --help* for more information. **./README.md**: user readme file in markdown format, also used as the project discription on GitHub. **./contrib/**: contributed scripts of random quality and completion. They usually require editing to run. **./doc/**: documentation, licenses, and tools for generating documents such as the *pdf* manual. **./lib/**: a couple libraries used in development. **./lisp/**: the [Emacs](http://www.gnu.org/software/emacs/) [ledger-mode](http://ledger-cli.org/3.0/doc/ledger-mode.html) lisp code, under the [GPLv2](http://www.gnu.org/licenses/gpl-2.0.html) license. **./python/**: samples using the Python ledger module. **./src/**: the C++ header and source files in a flat directory. **./test/**: a testing harness with subdirectories full of tests **./tools/**: an accretion of tools, mostly small scripts, to aid development