The means of communication would include pneumatic mail tubes, telephones, telegraphs, radios, and mechanically composed newspapers. -- Howard P. Segal, The Technological Utopians, in Joseph J. Corn (Ed.), Imagining Tomorrow: History, Technology and The American Future (Cambridge: MIT Press, 1986).
The magnetic interference can also cause problems with NFC performance on the new iPhones, and Apple has now started warning manufacturers in its MFi program with accessories supporting the devices to avoid magnets or metal.
Difference Between Permanent and Temporary Magnets. Magnets are an extremely important part of our daily lives. Magnets are used in door-catchers and to stick notes on to fridge doors, but often, unbeknown to us, most of the magnets that surround us are in electric circuits in the form of electromagnets.