Brain-Computer Interface, a technology that enables direct communication between the brain and external devices by detecting and interpreting neural signals.
Acronym formed in the 1970s from 'Brain-Computer Interface.' 'Brain' from Old English brægen, 'Computer' from Latin computare 'to calculate,' and 'Interface' from inter- 'between' + face, describing the boundary between two systems.
BCI technology is moving from science fiction to reality at breakneck speed—patients with paralysis can now control robotic arms with thoughts alone, and researchers are working on systems that could allow direct brain-to-brain communication. The ethical implications are staggering: if we can read thoughts directly, concepts like mental privacy and free will may need fundamental redefinition.
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