The best majors of Nanjing University are library and information management and astronomical geology, which belong to A+ disciplines. In addition, there are 1 1 A-level disciplines and 7 A-level disciplines. Nanjing University has eight national first-class key disciplines, namely Chinese language and literature, mathematics, physics, chemistry, astronomy, geology, biology, computer science and technology. The best majors of Nanjing University are library and information management and astronomical geology, which belong to A+ disciplines. In addition, there are 1 1 A-level disciplines and 7 A-level disciplines. Nanjing University has eight national first-class key disciplines, namely Chinese language and literature, mathematics, physics, chemistry, astronomy, geology, biology, computer science and technology.