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.
Communication Services
Fixed Line Telecommunications, Mobile Telecommunications
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
Energy
Exploration, Production, Refining, Marketing, Storage, and Transportation of Oil, Gas, Coal, and Consumable Fuels. Oil and Gas Equipment and Services
Financials
Banks, Diversified Financials, Insurance, Real Estate
Healthcare
Healthcare Equipment and Services, Healthcare Delivery, Pharmaceuticals, Biotechnology and Life Sciences
Industrials
Capital Goods, Commercial and Professional Services, Transportation
Information Technology
Technology Hardware and Equipment, Semiconductors and Semiconductor Equipment, Telecommunication Services
Materials
Chemical Manufacturing, Construction Materials, Glass, Paper, Forest Products and Related Packaging Products, Metals, Minerals, Mining Companies, Steel Production
Real Estate
Residential, Commercial, Industrial, Land
Utilities
Electricity, Gas, Water, Renewable Energy, Independent Power Producers, Energy Traders