'''Approval voting''' is a [[
voting system]] in which each voter can vote for as many or as few candidates as the voter chooses. It is typically used for single-winner elections but can be extended to multiple winners. Approval voting is a limited form of [[range voting]], where the range that voters are allowed to express is extremely constrained: accept or not.
Each voter may vote for as many options as they wish, at most once per option. This is equivalent to saying that each voter may "approve" or "disapprove" each option by voting or not voting for it, and it's also equivalent to voting +1 or 0 in a range voting system. The votes for each option are tallied. The option with the most votes wins.
*[[W:Combined approval voting|Combined approval voting]]
*[http://bcn.boulder.co.us/government/approvalvote/ Approval Voting Home Page]
*[http://approvalvoting.org/ Citizens for Approval Voting]
*[http://www.fairvote.org/op_eds/science2001.htm Rebuttal to "The Science of Elections"], Center for Voting and Democracy.