The term 'polling unit' refers to a physical location where citizens can cast their votes in an election. It is typically staffed by a team of election officials who are responsible for verifying the identity of voters, ensuring that only eligible voters are allowed to cast their ballots, and counting the votes. The term 'SAMPLE' (6 letters) is often used in the context of polling units to refer to a subset of the population that is used to represent the larger population in order to gain insight into the opinions of the larger population.