The iPad Air 2 and iPhone 6 have a built in barometer that can calculate atmospheric pressure. However, its sensitivity and accuracy are debatable.
Way before the World Wide Web (WWW) was created, Ted Nelson described Xanadu, a global network of computers in his books "Computer Lib / Dream Machines" (1974) and "Literary Machines" (1981). The invention of the World Wide Web is credited to Sir Tim Berners-Lee who created the global network while working at CERN, a high-energy physics organisation in Europe. In his original proposal for the WWW, Sir Tim had put Ted Nelson's "Getting it out of our system" as the first reference. [more...]