The index consists of large, medium, and small U.S. companies in the information technology sector. This sector is made up of companies in the following three general areas: technology software and services including companies that primarily develop software in various fields (such as the Internet, applications, systems, databases, management, and/or home entertainment), and companies that provide information technology consulting and services, data processing, and outsourced services; technology hardware and equipment, including manufacturers and distributors of communications equipment, computers and peripherals, electronic equipment, and related instruments; and semiconductors and semiconductor equipment manufacturers.