Different types of voting systems used worldwide include proportional representation, first-past-the-post, and ranked-choice voting. Proportional representation allocates seats based on the overall vote percentage, allowing for broader representation of diverse political parties. First-past-the-post awards victory to the candidate with the most votes in a single-member district, often leading to a two-party system. Ranked-choice voting allows voters to rank candidates in order of preference, promoting more inclusive outcomes by minimizing wasted votes. Each system has unique implications on electoral outcomes, party dynamics, and voter engagement.