A “hapto-digital interface” is that part of a system that enables the exchange of information between the entisphere and the digital infosphere by capturing sensory impressions gained by actively touching the perceptible surface appearance of a physical object.

A “hapto-digital interface” in the narrow sense is that part of a system that enables the transition of information between the tactile sense that enables haptic perception as part of the biological entisphere and the digital info sphere.

The term “hapto-digital interface” was proposed as part of the terminology of the “Digital Era Framework”. Within this frame of reference four spheres are distinguished, on the basis of which a classification of interfaces with regard to the type of manifestation of information can take place: The infosphere, which consists of the analog infosphere and the digital infosphere, the cognisphere and the entisphere.