A “Cogni-Digital System” is a set of elements of the cognisphere and the digital infosphere, between which there is a connection that allows a cooperative interaction to fulfill a certain function, a certain sense or a certain purpose, thereby forming a transspheral functional unit.

The term “Cogni-Digital System” was coined as part of the terminology of the “Digital Era Framework”. In this reference framework, based on the type of information manifestation, four spheres are identified, which may be used to categorize systems: The infosphere, which consists of the analog infosphere and the digital infosphere, the cognisphere and the entisphere. When elements of both the cognisphere and the digital infosphere are included in a system, the term “cogni-digital system” can be used.

The term “cyber-cognitive system” can serve as a synonym for the term “cogni-digital system”.