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 legs and attendees appreciated the extra space that the Sheraton Hotel provided. The vendor's area grew and more varied vendors and artists were able to attend. The attendance for SFotR 10 was well over 2250 people throughout the weekend. This was the first year that Sci-Fi on the Rock had a VIP pass. The change in location also gave Sandbox Gaming a bigger and more comfortable space at our convention for gaming. Sci-Fi on the Rock 11 was held at the Sheraton Hotel Newfoundland in St. John's from April 28–30, 2017. Guests included Doug Jones (actor), known from many films