Abstract : We update our CHEP06  presentation on the ATLAS experiment software infrastructure used to build, validate, distribute, and document the ATLAS offline software. The ATLAS collaboration's computational resources and software developers are distributed around the globe in about 35 counties. The ATLAS offline code base is currently over 7 million source lines of code in 10,000+ C++ classes organized into about 2,000 packages. More than 400 developers contribute code each month. Since our last report, we have developed a powerful, flexible system to request code versions to be included in software builds, made changes to our software building tools, increased the number of daily builds used to validate significant code changes, improved the tools for distributing the code to our computational sites around the world, and made many advancements in the tools to document the code.