pSiin

PSIIn is a fictional term used in science fiction and speculative design to describe a neural-adjacent communication protocol and device ecosystem. In different works, PSIIn expansions vary; common interpretations include "Pseudo-Synaptic Input Network" or "Psionic Interface Intranet." The concept centers on linking human cognition with external computers or virtual environments through hardware and software interfaces.

Depicted devices range from non-invasive wearables to implanted interfaces, and PSIIn is often portrayed as enabling low-latency telepresence, shared sensory experiences, and collaborative problem solving across users. The fictional framework typically emphasizes interoperability between hardware, software, and immersive environments, along with considerations of latency, bandwidth, and user agency.

PSIIn emerged in late 20th- and early 21st-century science fiction, where it is used to explore themes of cognitive augmentation, privacy, and collective cognition, sometimes intersecting with ideas from neural networks and augmented reality. Its portrayal varies from utopian to cautionary, depending on the narrative and authorial goals.

In real-world discourse, PSIIn is treated as a narrative device rather than a proven technology; scholars discuss its implications for ethics, security, consent, and the social dynamics of shared perception. The concept serves as a lens for evaluating how future interfaces might shape identity, autonomy, and human–machine collaboration within fictional and speculative contexts.

See also: brain-computer interface, neural interface, telepresence, augmented reality, cyberethics.