  The main theoretical tools used in the physics of cluster-laser interaction
are discussed starting from the basic principles of Quantum Mechanics and
ending with purely classical methods. The schematic overview of the theory is
complemented by direct links with various types of phenomena, regimes of
interaction and quantities to be studied. Finally, the theory is reflected in a
wide range of numerical simulations in order to prove their validity and the
work done in the field by the author.
