Final answer:
The Service Employees International Union (SEIU) organized the first Justice for Janitors campaign in Pittsburgh in the 1980s. This campaign was integral to the labor movement focusing on service industry workers' rights.
Step-by-step explanation:
The organization that organized the first Justice for Janitors campaign in Pittsburgh in the 1980s is the Service Employees International Union (SEIU).
The SEIU is known for its efforts to improve the working conditions and rights of service industry employees, including janitors. In the 1980s, the Justice for Janitors campaign focused on achieving fair wages, better working conditions, and respect on the job for janitors, who were often one of the most overlooked and underrepresented groups in the workforce.
This campaign was part of a broader labor movement during which many unions, such as the International Brotherhood of Teamsters (IBT) and the United Auto Workers (UAW), were actively organizing and negotiating for better conditions for the hardworking American labor force.