President Obama’s choice to head up the Library of Congress would be the first African American, and the first woman, to hold the job — if she’s approved by the Senate. And that fact would likely bring a fresh perspective to a job that is increasingly important to the technology industry. Obama on Wednesday nominated Carla Hayden, a former president of the American Library Association. If confirmed as librarian of Congress, Hayden would have a position with very real power, as it’s responsible for settling some of the weightiest policy questions in tech. The institution has handled questions such as whether it’s legal for you to unlock your own cellphone so you can take your device to another carrier, or whether it’s legal for security researchers or your local mechanic to access the software powering your car.