Doug McIlroy on what this is and why it is remarkable (thanks to knome for this explanation):<p><a href="http:&#x2F;&#x2F;www.tuhs.org&#x2F;Archive&#x2F;PDP-11&#x2F;Distributions&#x2F;research&#x2F;McIlroy_v0&#x2F;Readme" rel="nofollow">http:&#x2F;&#x2F;www.tuhs.org&#x2F;Archive&#x2F;PDP-11&#x2F;Distributions&#x2F;research&#x2F;Mc...</a><p>This is amazingly cool and clearly deserves more attention, so we&#x27;ve changed the title and re-upped the submission to give more people a chance to see it.<p>(Submitted title was &#x27;DMR Unix “Edition Zero” Manual Unearthed (restoration in progress)&#x27;.)