Three Laws of Robotics card-readers in "The Caves of Steel" have a capacity of only a few kilobytes per square centimeter of storage medium. "Aurora", in particular, presents a sequence of historical developments which explains the lack of nanotechnology — a partial retcon, in a sense, of Asimov's timeline. There are three Fourth Laws written by authors other than Asimov. The 1974 Lyuben Dilov novel, "Icarus's Way" (a.k.a., "The Trip of Icarus") introduced a Fourth Law of robotics: Dilov gives reasons for the fourth safeguard in this way: "The last Law has put an end to the expensive aberrations of designers to give psychorobots
Sci-Fi-London night (with the aid of ice-cream and caffeine drinks). In late 2008, SCI-FI-LONDON hosted its very first Oktoberfest: a one-day festival featuring new films and all-nighters, held at its regular London venue: the Apollo Piccadilly Circus. A second Oktoberfest was held on 23/24 October 2009, with a third on the 14-16 October 2010, at The Royal Observatory, Greenwich, the Royal Society and the Apollo Piccadilly Circus. On occasion, SCI-FI-LONDON has also hosted other events, either outside London, or at other times of the year. In 2005, SCI-FI-LONDON took its feature films, short films and all-nighters On Tour, to Edinburgh, Liverpool,