The structure of the book

This book has three parts. The first part, which includes this chapter, is about Go and the Go features that can be handy when developing systems software: this does not mean that you should use all of them when developing your programs. The second part is all about programming with files, directories, and processes, which is the most common type of systems software. The third part explores goroutines, web applications, and network programming in Go, which is the most advanced type of systems software. The good thing is that you do not need to read the third part of the book right away.