The CSL 1.0.2 specification has an exhaustive list of (discipline) Categories (Appendix 1).
I believe that “computer science” category is missing. Computer science styles have to use either “engineering” or “math”, which is not really appropriate.
(I’m not sure whether some other disciplines are missing from this list, I don’t see another clear hole of this size. I suspect that many distinct disciplines would be lumped in “humanities” or “social science”, but these arguably are well-understood umbrella terms that are standard for those disciplines.)