Of their publications, books (published annually[8]) include Jane's All the World's Aircraft, Jane's Fighting Ships, Jane's Military Communications,[9] Jane's World Air Forces,[10] Jane's World Navies,[10] and Jane's World Railways. Periodicals include Jane's Defence Weekly, Jane's Intelligence Review, Jane's International Defence Review, and Jane's Navy International. Jane's Police Review (2011) and Jane's Airport Review (2015) were discontinued.