That was one of the significant discussions when planning the book: who is it aimed at? Both of us are devs by background, but in discussion it turned out we ha

That was one of the significant discussions when planning the book: who is it aimed at? Both of us are devs by background, but in discussion it turned out we had been doing a lot of what was called "sysadmin" work as well. We both ended up doing DevOps (whatever that is), and pitched the book at mostly DevOps, then dev, then sysadmin in that order. But we don't really believe Docker is limited to one group of engineers. In a sense the semantics is irrelevant: if you're interested in software production and delivery then Docker is a tool you're going to want to know about.