This is the CodeSystem that contains all the codes in Software System Type Codes (http://terminology.hl7.org/CodeSystem/software-system-type-codes) and Software System Type Codes (http://terminology.hl7.org/CodeSystem/software-system-type-codes). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem 4c05a9f5-c5c6-415b-bc13-3335b255c8a0-791
This code system http://hl7.org/fhir/comparison/CodeSystem/4c05a9f5-c5c6-415b-bc13-3335b255c8a0-791 defines codes, but no codes are represented here