I.B.M. Seeks to Make the Mainframe Modern Technology - New York Times

I.B.M. Seeks to Make the Mainframe Modern Technology - New York Times: "The mainframe business, while far smaller than it was, remains crucial for I.B.M. Sales of the machines alone account for only about 5 percent of I.B.M.'s revenue. But all mainframe-related hardware, software and services account for a quarter of its revenue and, more important, about half of I.B.M.'s total operating profit, A. M. Sacconaghi, an analyst at Sanford C. Bernstein & Company, estimates. "