Not everyone. Just self-proclaimed authority who decided systems means operating system or some embedded code. Lots of companies I worked have title Systems Engineer or departments Systems engineering which has nothing to do with Operating systems but just some internal applications.
> Just self-proclaimed authority who decided systems means operating system or some embedded code
Systems does mean that. There are 2 broad categories of software you can write. One is software that provides a service to the user directly. That is an application. The other kind is software that provides a service to applications. That's systems software. Do you think there's something wrong with this notion? It's pretty well accepted over the decades:
Well by that definition Docker, Kubernetes, etcd and so on are systems software. But people here somehow explicitly make it to mean Computer Operating Systems.
