The Symbiosis Era
The era in which the augmentation tradition matured into an empirical research discipline and computation became integrated, often invisibly, into the professional practices it had begun by serving.
The discipline of human-computer interaction comes of age.
The Symbiosis Era is the period in which HCI consolidated as a mature empirical discipline. Card, Moran, and Newell's Psychology of Human-Computer Interaction had brought quantitative rigor to the field in 1983. Through the nineties, Suchman's Plans and Situated Actions, Hutchins's Cognition in the Wild, and Norman's Things That Make Us Smart established that human cognition is irreducibly situated, distributed, and tool-mediated. Computation was no longer something added to human work — it was a constituent part of how cognitive labor happened.
The same period saw the rise of knowledge management, the establishment of the World Wide Web, and the integration of computational tools into clinical practice, financial advisory, scientific research, and legal work. The augmentation tradition was now operationalized at scale.
Practice without disciplinary articulation.
The Symbiosis Era integrated the augmentation tradition into working practice without yet articulating it as a unified philosophical discipline. HCI was a research field; knowledge management was a corporate function; clinical decision support was a clinical-informatics specialty. Each operated on the augmentation premise but each spoke only the vocabulary of its own subfield. The unifying framing — that all of this was a single discipline of architecting intelligence around named human cognition — would not yet be articulated. That work was for the era to follow.