The McGraw-Hill Companies, based in New York, was formed with the 1909 merger of The McGraw Publishing Company, founded by James H. McGraw in 1902, and The Hill Publishing Company, established by John A. Hill. The firm specializes in publishing magazines, textbooks, and general titles on business, engineering, and the sciences. The company publishes 'BusinessWeek,' 'Architectural Record,' 'Aviation Week,' 'Engineering News-Record,' 'Electrical World,' and other magazines. Textbooks are developed for the K-12, college, and professional markets. The McGraw-Hill Education business serves the K-12 market. The firm's Standard & Poor's business collects and publishes investment information. It also produces indexes and credit ratings. Standard & Poor's is known for its S&P 500 U.S. portfolio index. It also collects credit ratings information on 220,000 securities and funds worldwide. McGraw-Hill includes the J.D. Power and Associates, Platts, and McGraw-Hill Construction businesses. The firm's Primis Custom Publishing service, launched in 1989, allows professors to design their own textbooks. McGraw-Hill launched its corporate website and the BusinessWeek Online website in the mid-1990s. The firm has acquired California Test Bureau, F.W. Dodge Corporation, Standard & Poor's, Appleton and Lange, Mayfield Publishing Company, Tribune Education, and other companies. McGraw-Hill has won recognition from 'BtoB.'