Utility fog
hypothetical collection of tiny robots that can replicate a physical structure
Utility fog (also referred to as foglets) is a hypothetical collection of tiny nanobots that can replicate a physical structure. As such, it is a form of self-reconfiguring modular robotics.
Conception
The term was coined by John Storrs Hall in 1989. Hall thought of it as a nanotechnological replacement for car seatbelts. The robots would be microscopic, with extending arms reaching in several different directions, and could perform three-dimensional lattice reconfiguration. Grabbers at the ends of the arms would allow the robots (or foglets) to mechanically link to one another and share both information and energy, enabling them to act as a continuous substance with mechanical and optical properties that could be varied over a wide range. Each foglet would have substantial computing power, and would be able to communicate with its neighbors.
In the original application as a replacement for seatbelts, the swarm of robots would be widely spread out, and the arms loose, allowing air flow between them. In the event of a collision the arms would lock into their current position, as if the air around the passengers had abruptly frozen solid. The result would be to spread any impact over the entire surface of the passenger's body.
This brief starts where responsible research should: with the source description of “Utility fog” as hypothetical collection of tiny robots that can replicate a physical structure. Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the general reference register because the source frames it as hypothetical collection of tiny robots that can replicate a physical structure. Its deeper value depends on whether names, dates, institutions and citations support that framing.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Aug 18, 2025. The linked authority identifier is Q2578825. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1989.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Utility fog” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.