What did a checker do?

Answer 1

A checker typically refers to a person or device that verifies the accuracy or quality of something. In various contexts, checkers can ensure that tasks are completed correctly, such as in quality control in manufacturing, or they may be involved in reviewing documents, financial records, or other data. In games like checkers, a checker is also a playing piece used to move strategically on a board. Overall, the primary function of a checker is to ensure compliance with standards or rules.