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 (album) Sci-Fi (album) Sci-Fi is the fourth studio album by American jazz bassist Christian McBride released in 2000 via Verve label. Some tracks of the material are pop standards. John Fordham of "The Guardian" wrote "Sci-Fi starts unpromisingly, with a rather anonymous, swoony, mixed-tempo account of Steely Dan's 1977 hit Aja that only ignites with David Gilmore's guitar solo. Yet, as it continues, US bass star McBride's typically broad-minded set emphasises both his own playing gifts and their pulling-power with some of the biggest names in the business. McBride's clarity of sound, the bullet-like impact he imparts to every note at