Businesses that connect employers with potential employees were categorized under Standard Industrial Classification (SIC) 7361. This four-digit numerical system, formerly used by the United States government to classify industries, helped organize economic data collection and analysis. For example, an organization specializing in placing temporary office workers would have fallen under this designation.
This classification system provided a standardized method for tracking industry trends, analyzing labor markets, and conducting economic research. While the SIC system has been superseded by the North American Industry Classification System (NAICS), understanding historical SIC codes can be valuable when researching past economic activity or analyzing older datasets. The historical context offered by these codes allows researchers to track the evolution of specific industries over time.