There are approximately 7,500 apparel firms currently operating in California most of which are located in Los Angeles, officially employing 144,000 workers. The majority of workers are immigrant women working as sewing machine operators for minimum wage and are not represented by a union. Under the direction of Beate Ritz and Niklas Krause, a number of ergonomics studies have been underway and/or completed. A labor-management research initiative led by Linda Delp documented the continued importance of addressing the human-machine interface among clerical workers through adjustable workstations and worker education as well as the importance of a comprehensive injury prevention and health promotion approach.