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 on the Rock As a result of the success of the first festival, Sci-Fi on the Rock organizers Darren Hann and Melanie Collins, as well as the now-larger organizing committee decided that the festival should be held again the following year and should be bigger. Around the summer of 2007, planning for Sci-Fi on the Rock II would commence. The first change was time and place. It was increased from a one-day to a full weekend event, and was held in a larger venue. Sci-Fi on the Rock II was held at the Holiday Inn hotel in St. John's, on Saturday, April 19