Medical: especially first year undergraduate and core anatomy/physiology/surgical textbooks
Law: especially human rights
Computing: especially basic Office
Library and information management
These books reach public and community libraries, and libraries in schools, universities, slums, refugee centres, NGOs and prisons. Users of these libraries are often some of the most vulnerable and underprivileged in society. In 2012 book aid international sent 33,560 books to Namibia. We can do that with one Raspberry Pi!