Slot machine prohibitions occurred in several states during the early 1900s. The machines' designers redesigned them to dispense candy or gum as prizes in order to get around gambling laws. Known as "trade stimulators," these altered drummy esatevices supported the slot machine business throughout the Prohibition era. Electromechanical slot machines, fusing electronic & mechanical elements, were first introduced in the 1960s. Modern video slot machines were made possible by this breakthrough, which also led to more intricate games with numerous paylines and bonus features. Even more sophisticated features and game designs were made possible by the 1980s microprocessor revolution in slot machine technology.