Some of the technological applications of superconductivity include: * the production of sensitive magnetometers based on SQUIDs (superconducting quantum interference devices) * fast digital circuits (including those based on Josephson junctions and rapid single flux quantum technology), * powerful superconducting electromagnets used in maglev trains, magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR) machines, magnetic confinement fusion reactors (e.g. tokamaks), and the beam-steering and focusing magnets used in particle accelerators * low-loss power cables * RF and microwave filters (e.g., for mobile phone base stations, as well as military ultra-sensitive/selective receivers) * fast fault current limiters * high sensitivity particle detectors, including the tr