Directory service, a software application for organizing information about a computer network's users and resources
Directory (political), a system under which a country is ruled by a college of several people who jointly exercise the powers of a head of state or head of government
French Directory, the government in revolutionary France from 1795 to 1799
Business directory, a listing of information about suppliers and manufacturers
City directory, a listing of residents, streets, businesses, organizations or institutions, giving their location in a city
Telephone directory, a book which allows telephone numbers to be found given the subscriber's name
Web directory, an organized collection of links to websites