This is a book about how to build complex systems. It provides a foundation for understanding what is involved in the work, as well as pragmatic advice on how to go about it.

It is intended for practitioners: systems engineers, developers, and managers—with the belief that everyone involved needs to understand the overall work in order to do their part well.

This web version is an on-line release of a work in progress. It is updated regularly as more parts are completed.

Contact the author at systems@chrysaetos.org.