Olivia Norman’s fingers fly across her laptop keyboard, dexterously tapping out instant messages to friends and entering Google searches without committing a single typo. A minute later, she’s listening intently to the voice cues that help her read e-mail and send text messages on her Motorola Q smartphone. Norman is blind, so the cues help her navigate the tiny keypad and understand the words on the screen. She can’t order an on-demand movie from Comcast because she can’t read the on-screen menus.
