First, many thanks to the great group of developers who dove in right from the beginning and have contributed the code and ideas to make &SCons; a success: Chad Austin, Charles Crain, Steve Leblanc, and Anthony Roach. Thanks also to those on the scons-devel mailing list who have contributed greatly to the discussion, notably including David Abrahams, Trent Mick, and Steven Shaw. &SCons; would not exist today without the pioneering work of Bob Sidebotham on the original &Cons; tool, and without Greg Wilson's having started the Software Carpentry contest. Thanks also to Peter Miller for: Aegis; the testing discipline that it enforces, without which creating a stable but flexible tool would be impossible; the "Recursive Make Considered Harmful" paper which led me to experiment with &Cons; in the first place.