The FBI has announced that, after 12 years and $600 million, it has finally abandoned paper records in favor of a computerized system called Sentinel. Resembling a browser, it offers question-and-answer forms, case tracking and an ability to share files across the bureau's network. Assistant director Jeffrey Johnson said that the biggest hurdle was convincing paper-loving agents to get on board, so the system is designed to nag users into adding relevant data that's still extant on dead-trees. With any luck, some enterprising young agent will take advan