Yes, this is close to what I'd also prefer to be my definition. "Systems programming" is about writing the programs that users don't care about. This involves

Yes, this is close to what I'd also prefer to be my definition. "Systems programming" is about writing the programs that users don't care about. This involves all kinds of infrastructure: certainly the kernel, but also various other bits of critical plumbing. But that doesn't fit the definition from that Usenix paper, as nroff was an important user-visible application program, even if it isn't much anymore. I think it is probably best to avoid using the term "systems programming" except when within a constrained community where the intended meaning is clear. Just look at how much confusion arose from the original announcement that Go was a systems programming language!