Agriculture -- producers of farm-based food products, as well as firms engaged in biologically modified food production.

Airlines -- companies that own and operate passenger airlines.

Apparel, Shoes & Accessories Industry -- designers, manufacturers, and retailers of clothing for men, women, and children.

Automobiles -- makers of autos and auto parts, trucks and buses, RVs, and other vehicles.

Banks & Savings Institutions -- commercial, consumer, money center, and other banks, as well as savings and loan companies.

Beverages -- producers and distributors of beer, wine, liquor, soft drinks, and other potables.

Biotechnology -- drug discovery and production companies, and biologically engineered food production firms.

Chemicals -- makers of basic and intermediate chemicals, specialty chemicals, agricultural chemicals, petrochemicals, plastics and fibers, and paints and coatings.

Computer Services -- information technology consulting, systems integration, and IT training and education.

Computer Software -- designers, developers, and marketers of computer software products.

Construction & Building Materials -- makers of building materials, as well as construction firms, architecture and engineering firms, and manufactured housing makers.

Consumer Electronics & Appliances -- manufacturers and marketers of home audio and visual equipment, such as radios, stereos, television sets, and VCRs, as well as makers of commercial and household electronic appliances.

Energy -- oil and gas exploration, refining, storage, distribution, and marketing companies.

Environmental Equipment & Services -- providers of environmental protection equipment and services such as pollution control products, waste management, and recycling operations.

Financial Services -- asset management, investment brokerage, venture capital, lending, and other financial service providers.

Food -- producers and distributors of various fresh, frozen, canned, and other food products.

Gambling -- casinos and gambling resorts, lottery commissions, and gambling equipment makers and service providers.

Health Care Services -- HMOs and health care plans, hospitals and nursing homes, medical practice management companies, and medical laboratories.

Home Furnishings & Housewares -- manufacturers of kitchenware, utensils, furniture, and similar products.

Home Improvement -- includes small tool manufacturers and operators of hardware and home improvement retail stores.

Insurance -- providers of life, health, property/casualty, auto, and other lines of insurance, as well as reinsurance companies and insurance brokers.

Machinery & Tools -- manufacturers and distributors of industrial machinery, tools, electrical equipment, and other products.

Medical Equipment -- makers and distributors of medical supplies, instruments, and equipment.

Metals & Mining -- miners, processors, and distributors of metals, minerals, and precious stones.

Movies & Music -- companies involved in film and music production, publishing, and distribution.

Music, Video & Book Retailing -- sellers of music, video, and book products, as well as videocassette and DVD rental companies.

Personal Care & Household Cleaning Products -- makers of personal care and hygiene products such as cosmetics, perfumes, and toiletries, as well as household cleaning products.

Personal Computers -- companies that manufacture, support, and market desktop PCs, as well as portable and notebook personal computers.

Pharmaceuticals -- manufacturers and distributors of name-brand and generic pharmaceutical products.

Publishing & Printing -- publishers and distributors of books, periodicals, newspapers, and other print media products.

Real Estate -- real estate investment trusts (REITs), property management companies, real estate developers, and residential construction firms.

Restaurants -- companies that own and operate restaurants.

Semiconductors -- makers of broad line and specialized semiconductor equipment, memory chips, and other products.

Sporting Goods -- manufacturers and retailers of sporting and athletic equipment, as well as hunting and fishing products.

Supermarkets, Drugstores, & Mass Merchandisers -- grocery and supermarket retailers, wholesalers, convenience stores, and drug, health, and beauty retailers.

Telecommunications Equipment -- includes makers of satellite and satellite-based equipment, wireless products, and communications processing equipment.

Telecommunications Services -- providers of telephone transmission services and equipment.

Toys & Games -- manufacturers and retailers of toys, games, musical instruments, and hobby products.

Transportation -- air couriers, trucking, railroads, shipping, and logistics service providers.

Travel Services & Lodging -- travel agencies, tour operators, and hotels, motels, and resorts.

TV & Radio -- television and radio producers, programmers, and broadcasters.

Utilities -- providers of electric, water, and gas services, as well as developers of alternative energy sources.

Wireless Services -- providers of cellular, paging, wireless data and messaging, and other mobile telecommunication services.