1. Introduction; 2. Basic existence theorems for matrices with prescribed properties; 3. The class A(R; S) of (0,1)-matrices; 4. More on the class A(R; S) of (0,1)-matrices; 5. The class T(R) of tournament matrices; 6. Interchange graphs; 7. Classes of symmetric integral matrices; 8. Convex polytopes of matrices; 9. Doubly stochastic matrices.