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 the day including the popular "Lightsaber Techniques", "Basic Horror Make-Up for Film and Television" and "Costume Designing". In addition, there were a number of sales-and-display tables, and a number of competitions such as Video Games, Model Building, Costume Contest, and others. Sci-Fi on the Rock also featured a canteen with Sci-Fi related food (i.e.: "The Kirk Burger"). Having been planned and put off within only a few months, and with little publicity, Sci-Fi on the Rock's first festival was a surprise success with almost 500 people attending, and was covered in many local media pages, as well as internet sites.