- The [Twiki](https://twiki.cern.ch/twiki/bin/view/AtlasComputing/AtlasComputing) is the main source of documentation, and has many links to sub-domains
- The [software documentation](https://atlassoftwaredocs.web.cern.ch) page has some tutorials etc
- The git repository is [here](https://gitlab.cern.ch/atlas/athena)
- And the Doxygen code documentation can be found [here](http://atlas-sw-doxygen.web.cern.ch/atlas-sw-doxygen)
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- And the Doxygen code documentation can be found [here](https://atlas-sw-doxygen.web.cern.ch/atlas-sw-doxygen/atlas_22.0.X-DOX/docs/html/index.html)
