Individual #electronics__electronic  the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices
  >part of:  physics__physic__physical_science__natural_philosophy__naturalphilosophy  the science of matter and energy and their interactions
  >part:  electron_optics  the branch of electronics that deals with beams of electrons and their focusing and deflection by magnetic fields
  >part:  microelectronics  the branch of electronics that deals with miniature components
  >part:  thermionics__thermionic  the branch of electronics dealing with thermionic phenomena (especially thermionic vacuum tubes)

No statement uses or specializes electronics; click here to add one.