userlandin
Userlandin is a fictional neuromodulator and software interface widely cited in speculative fiction and worldbuilding as a means to bridge digital user-space processes with biological neural networks. The term combines "userland," the layer of software outside the kernel, with the chemical suffix "-in" to imply a transformative agent that mediates interaction between software and brain tissue.
In the depicted universes, userlandin is a compact molecule capable of crossing the blood-brain barrier and
History and usage within the fiction often link userlandin to debates on cognitive enhancement, data privacy,
See also: Userland, Neural implant, Cognitive enhancement, Brain-computer interface.