Johnson & Johnson is a holding company, which engages in the research, development, manufacture, and sale of products in the healthcare field. It operates through the Innovative Medicine and MedTech segments. The Innovative Medicine segment focuses on immunology, infectious diseases, neuroscience, oncology, cardiovascular and metabolism, and pulmonary hypertension. The MedTech segment includes a portfolio of products used in interventional solutions, orthopaedics, surgery, and vision categories. The company was founded by Robert Wood Johnson I, James Wood Johnson, and Edward Mead Johnson Sr. in 1887 and is headquartered in New Brunswick, NJ.