The extended geminal models are reviewed with emphasis both on their concep
tual structure and computational feasibility. A new numerical model which d
rastically reduced the computation time at the cost of a very small reducti
on in accuracy, is introduced. A review of the applications of the extended
geminal models to studies of intermolecular interactions is given, and the
neon dimer is considered in more detail to illustrate the properties of th
ese models.