# BCI Human Interface Device
**Entity class:** Technology, method, or technical system
**Type:** Interface protocol
**Collection:** [[collections/Neurotech|Neurotech]]
**Primary source:** [[articles/2026 Annual Report on Brain-Computer Interfaces|2026 Annual Report on Brain-Computer Interfaces]]
## Definition
BCI-HID is the Apple device-input protocol described as making brain-computer interfaces a native accessibility input category.
## Relationships
[[wiki/BCI Human Interface Device|BCI-HID]] is related to [[wiki/Synchron|Synchron]], [[wiki/Apple|Apple]], [[wiki/Stentrode|Stentrode]], and operating-system accessibility.
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This entry is routed through [[collections/Neurotech|Neurotech]]. Its source context is developed in [[articles/2026 Annual Report on Brain-Computer Interfaces|2026 Annual Report on Brain-Computer Interfaces]], [[articles/Mind Uploading and AI — The Host is Reusable and the Person is the Delta|Mind Uploading and AI — The Host is Reusable and the Person is the Delta]], [[articles/Technologies for Consciousness Mapping and Transfer|Technologies for Consciousness Mapping and Transfer]], and [[articles/The Architecture of Continuity and Emerging Neuroinformatics Standards|The Architecture of Continuity and Emerging Neuroinformatics Standards]]. Status-qualified source edges are preserved in the terminal Research Edges section.
### Additional Documented Relationships
- [[wiki/BCI Operating-System Substrate|BCI Operating-System Substrate]] is bridged through **BCI Human Interface Device**. Treat OS/API layer as its own wiki entry. not a Synchron footnote.
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## Source route
[[articles/2026 Annual Report on Brain-Computer Interfaces|2026 Annual Report on Brain-Computer Interfaces]] · [[collections/Neurotech|Neurotech]]
## Neurotech source route
**Collection:** [[collections/Neurotech|Neurotech]]
**Source article:** [[articles/The Organic-Synthetic Brain Atlas|The Organic-Synthetic Brain Atlas]]
## Related Work in the Corpus
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- In [[articles/The Organic-Synthetic Brain Atlas|The Organic-Synthetic Brain Atlas]], **VII.9 — Operating-System Integration and the BCI HID Layer** provides the narrative context for **BCI Human Interface Device**: The decisive infrastructural transition of 2025 was Apple's announcement of the BCI HID (Brain-Computer Interface Human Interface Device) protocol — a native operating-system specification for accepting input from brain-computer…
- In [[articles/2026 Annual Report on Brain-Computer Interfaces|2026 Annual Report on Brain-Computer Interfaces]], **Synchron: The Minimally Invasive Counter-Geometry** provides the narrative context for **BCI Human Interface Device**: In November 2025, Synchron raised \$200 million in Series D funding led by Double Point Ventures (co-founder and managing partner Campbell Murray, MD), accelerating pivotal trials and commercial launch preparations.
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## Research Edges
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#### Master relationship graph patch — 2026-09-10
**Collection:** [[collections/Neurotech|Neurotech]]
**Relationship source:** [[research/Neurotechnology Ecosystem Relationship Graph - 2026-09-10|Neurotechnology Ecosystem Relationship Graph — 2026-09-10]]
**Related source articles:** [[articles/The Architecture of Continuity and Emerging Neuroinformatics Standards|The Architecture of Continuity and Emerging Neuroinformatics Standards]] · [[articles/2026 Annual Report on Brain-Computer Interfaces|2026 Annual Report on Brain-Computer Interfaces]] · [[articles/The Organic-Synthetic Brain Atlas|The Organic-Synthetic Brain Atlas]]
#### Incoming typed edges
- **Edge 413 — [[wiki/BCI Operating-System Substrate|operating-system BCI integration]] `bridge_entities` → this entry** — **CORPUS**; evidence `CORPUS_BCI`, `CORPUS_ATLAS`. Treat OS/API layer as its own wiki entry, not a Synchron footnote.
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## Research Inferences
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These entries translate the forward-looking register in [[research/Research Inferences|Research Inferences]] into ordinary wiki prose. The tier labels apply to the inference, not automatically to every factual anchor inside it. The interpretive frame comes from [[articles/Technologies for Consciousness Mapping and Transfer|Technologies for Consciousness Mapping and Transfer]] and [[articles/Mind Uploading and AI — The Host is Reusable and the Person is the Delta|Mind Uploading and AI — The Host is Reusable and the Person is the Delta]]. Collection route: [[collections/Neurotech|Neurotech]].
- **INF-0076 — Established.** Apple's BCI HID protocol makes neural signal a native input class alongside touch and voice, which moves the interface question from the implant vendor to the operating-system vendor. Every application on the platform becomes addressable by thought without any application being rewritten.
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