I'm slightly hesitant to agree with both of these. The first seems wrong to me, because Bash qualifies, whereas Tcl doesn't. The second is better, though I thin

I'm slightly hesitant to agree with both of these. The first seems wrong to me, because Bash qualifies, whereas Tcl doesn't. The second is better, though I think it excludes some interesting languages, like Scala, which you probably wouldn't write an operating system in, but that you could certainly build "systems" in (e.g., Spark).