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 2c77c26f-0eba-4543-89eb-09eda3cba01c-1577
This code system http://hl7.org/fhir/comparison/CodeSystem/2c77c26f-0eba-4543-89eb-09eda3cba01c-1577
defines codes, but no codes are represented here