This document gives an overview of the structure of Hopfield Networks 
(HN) and describes some applications. After a short general 
description of neural networks, the hopfield networks and the 
available learning methods are described to some detail. A number of 
applications such as the TSP problem and pattern recognition and 
finally a programming project concerning the usage of HN in pattern 
recognition are discussed. The project includes some algorithms of 
image processing and feature space transformation to prepare the input 
picture for the network.