The Royal Mail (U.K.) has launched a special stamp set in honor of British inventors. The stamps pictured above depict a wide variety of British inventions (moving clockwise, from top-left to bottom-left): the World Wide Web, the world’s first digital computer (Colossus), the i-limb prosthetic hand, the cat’s eye retroreflective road safety device, fiber optics, and DNA sequencing. (Hat tip: Cliff Pickover, via Twitter.)