  In He-3 superfluids quantized vorticity can take many different forms: It can
appear as distributed periodic textures, as sheets, or as lines. In the
anisotropic He-3A phase in most cases the amplitude of the order parameter
remains constant throughout the vortex structure and only its orientation
changes in space. In the quasi-isotropic He-3B phase vortex lines have a hard
core where the order parameter has reduced, but finite amplitude. The different
structures have been firmly identified, based on both measurement and
calculation. What parallels can be drawn from this information to the new
unconventional superconductors or Bose-Einstein condensates?
