‘The global computer’ aims to change the reader's perception of a computer from a single grey box to part of a global supercomputer linked via the Internet. Computers cannot solve every problem easily. These wicked problems can only be solved using supercomputers. In the seventies and eighties vector architecture supercomputers were used, but in the nineties mass–produced processors became cheap enough to be linked together, which made supercomputing much more affordable. The Internet is similar to a supercomputer in that many processors are linked together. Grid computing allows many processors all over the world to act as a supercomputer and work on the same problem, massively reducing hardware costs.