T.V. Raman was a bookish child who developed a love of math and puzzles at an early age. That passion didn't change after glaucoma took his eyesight at the age of 14. What changed is the role that ...

Even before the iPhone hype kicked into high gear over the past few months, touch screens in general were becoming more popular in cell phones. About 38 million handsets, or about 4 percent of all ...