A sector refers to a large segment of the economy, while the term industry describes a much more specific group of companies or businesses within a sector.
Energy
Exploration, Production, Refining, Marketing, Storage, and Transportation of Oil, Gas, Coal, and Consumable Fuels. Oil and Gas Equipment and Services
Materials
Chemical Manufacturing, Construction Materials, Glass, Paper, Forest Products and Related Packaging Products, Metals, Minerals, Mining Companies, Steel Production
Industrials
Capital Goods, Commercial and Professional Services, Transportation
Consumer Discretionary
Automobiles and Components, Consumer Durables and Apparel, Consumer Services, Media, Travel and Leisure, Retailing
Consumer Staples
Food, Beverage and Tobacco, Household and Personal Products
Healthcare
Healthcare Equipment and Services, Healthcare Delivery, Pharmaceuticals, Biotechnology and Life Sciences
Financials
Banks, Diversified Financials, Insurance, Real Estate
Information Technology
Technology Hardware and Equipment, Semiconductors and Semiconductor Equipment, Telecommunication Services
Communication Services
Fixed Line Telecommunications, Mobile Telecommunications
Utilities
Electricity, Gas, Water, Renewable Energy, Independent Power Producers, Energy Traders
Real Estate
Residential, Commercial, Industrial, Land