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Service Sector: Place in Economy, Definition and Examples - Investopedia
Service Sector - Definition, Example, Sectors, Place
Nine facts about the service sector in the United States
Tertiary sector of the economy - Wikipedia
Service sector of the U.S. - statistics & facts | Statista
What To Know About the Rise of Services | St. Louis Fed
Service industry | Job Creation, Innovation & Automation
Service economy - Wikipedia
The Service Sector: Powering Economic Growth and Innovation