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 Valley Con Sci-Fi Valley Con Team also spent a year building a lifesize Claptrap from the Borderlands video game series. This will be one of the most realistic lifesize replicas of Claptrap in existence. The prop made its world debut alongside David Eddings who voiced the character in the video games and Dameon Clarke who voiced Handsome Jack in Borderlands and Cell from the Dragon Ball Z series. Sci-Fi Valley Con, Part 7 show was on June 8–10, 2018 at Blair County Convention Center in Altoona, PA. The 2018 celebrity guest list included: Jim Beaver, best known from his role as Bobby