This book considres one the main problems in discrete mathematics which is called the classification problem. In such a problem, given a collection of properties, construct up to isomorphism all structures that satisfy them. In otherwords, the classification problem is the problem of determining complete systems of representatives of the isomorphism classes. Also, this book considers both the use of invariants and the use of partition backtracking for solving the isomorphism problems of 0,1-matrices, in general. It also discusses the inverse problem of finding all structures for a given...