The Free On-line Dictionary of Computing (30 December 2018):

Hopfield network
Hopfield model

    (Or "Hopfield model") A kind of
   neural network investigated by John Hopfield in the early
   1980s.  The Hopfield network has no special input or output
   neurons (see McCulloch-Pitts), but all are both input and
   output, and all are connected to all others in both directions
   (with equal weights in the two directions).  Input is applied
   simultaneously to all neurons which then output to each other
   and the process continues until a stable state is reached,
   which represents the network output.

   (1997-10-11)