Glossary

Key Points

Introduction to ATLAS Offline Software	Athena is a collection of common packages that are compiled and released regulariy. Your analysis project is just an external package.
Your Workspace	Use three directories: `source/` for code, `build/` for binaries and `run/` for output.
The Top-Level CMakeLists.txt	Copy-paste the generic `CMakeLists.txt` from the ATLAS Software Documentation and place it inside the `source/` directory.
The Package CMakeLists.txt	Use ATLAS macros. They specify a structure to your `build/` directory that makes your life easy!
Coffee break!	Coffee sucks, drink tea.
Calibrate Your Jets	There are nice official tools to apply calibrations.
Modyfing an Athena Package	Don’t compile the entire athena repository. Use either sparse checkouts or `package_filters.txt` to specify what packages you want to compile.

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