There is no predetermined uniform classification of electoral systems. In general, electoral systems are divided into three main types: majority or plurality/first-past-the-post, proportional representation and hybrid. Yet within these major types, there is a virtually unlimited number of voting methods. Just to take plurality and majority systems, Frédéric Bon calculated that there were no fewer than eighty on the basis of general criteria alone (number of rounds, counting methods, types of constituency/electoral district). Consequently in order to give the best possible account of the various different forms which electoral systems may take, this report will concentrate on identifying their main features.