The book analyses Borane clusters using skeletal numbers, the K(n) of a borane cluster is calculated. This Parameter is utilized to derive six equations which are used to calculate cluster valency electrons, it is also used to generate a skeletal isomeric shape of the cluster. Hydrogen atoms and charges if available can readily be distributed on the boron node points with five linkages, the resulting structure of the cluster is in agreement with the borane cluster formula. The K(n) parameter is also extremely useful in categorizing borane clusters.