Multi-round voting
Ranked / preferential systems
Cardinal / graded systems
Proportional forms of ranked voting
Proportional forms of cardinal voting
Biproportional apportionment
Fair majority voting
Weighted voting
Non-compensatory mixed systems
Compensatory mixed systems
Other systems
Social choice theory
List of electoral systems
Effects of electoral systems
Approval voting is an electoral system in which voters can select any number of candidates instead of selecting only one.
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