A blue pages is a telephone irectory listing of government agencies and other official entities, along with specific offices, departments, or bureaus located wherein. In the United States, the blue pages will include state, federal, and local offices, including service districts such as school districts, port authorities, public utility providers, parks districts, fire districts, and the like. The blue pages may also provide information about government services, in addition to officials' names, addresses, telephone numbers, and other contact information. The color blue is likely derived from so-called government blue books, official publications printed by a government (such as that of a state) describing its organization, and providing a list of contact information. (The blue pages published in a printed telephone directory is usually quite abridged, compared to official blue books).