Quaternary sector is an economic sector with primary services based on research, information, and technology. Examples are computing services, media, information and communication technology, consulting, and research and development.
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Sometimes, this sector is included in the tertiary sector because both are service sectors. Some authors separate the two sectors because of the significant contribution of the quaternary sector to economic development. In developed countries, the tertiary and quaternary sectors account for the majority of economic output and employment.
