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{system, computer, user}
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{build, building, house}
{law, state, case}
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Kuro5hin (K5) (pronounced "corrosion", i.e. /kɵˈroʊʒən/[1]) is a collaborative discussion website. Articles are created and submitted by Kuro5hin's users and submitted to queue for evaluation. Site members can vote for or against publishing an article and, once the article has reached a certain number of votes, it is then published to the site or deleted from the queue.[2] The site has been described as "a free-for-all of news and opinion written by readers".[3]

Kuro5hin is powered by the Scoop collaborative system. Its motto is "Technology and Culture, from the Trenches". It was founded by Rusty Foster in December 1999.[1] Kuro5hin's membership used to number in the tens of thousands[2], but its popularity has declined significantly from its peak in the early 2000s, and the present number of active users is much less (likely in the low hundreds).[4]



All content is generated and selected by the users themselves with the exception of site news, that are written by the site administrators. Registered users can submit stories to the submissions queue. In the queue, users vote +1 FP (front page), +1, 0, or -1. If the story reaches a predetermined threshold score (originally at +95 and lowered from +70 to +40 in December 2006 due to the site's waning popularity), it is posted to the front page or to the relevant section depending on the proportion of FP votes. If it fails to make the threshold, other factors (such as number of comments and their ratings) can still cause the story to be posted to section. Otherwise, it is dropped.[5]

One feature of the story queue is edit mode, in which a story is protected from voting for a period of time and the author can make changes. Comments can still be made on the story to suggest changes before voting begins. They are distinguished as being editorial or topical comments.

A further section is known as the diaries. They have no editing or moderation vetting and are essentially weblogs.[6] They are the source of most of Kuro5hin's content by volume, though unlike the edited article sections, they are not widely syndicated.

Kuro5hin site administrators have on several occasions revealed the full name of a user, and are known to publish complaints and comments emailed by readers, usually to publicly ridicule and insult them.[7][8][9][10]


Rusty Foster named Kuro5hin — which is, as noted, pronounced corrosion — as a pun on his first name. The number 5 was inspired by a character called Da5id in Neal Stephenson's 1992 science fiction novel Snow Crash. Dylan Griffiths (Inoshiro) was second-in-command as site administrator for a time.

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