 Leading companies are selected from several industries, including computer hardware, software, semiconductors, telecommunications, electronics, aerospace and defense, health care equipment, and biotechnology.Modeled as a multi-industry technology index, the objective of the NYSE Arca Tech 100 Index is to provide a benchmark for measuring the performance of companies using technology innovation across a broad spectrum of industries.Unlike other indexes, whose historic returns date back only a few months or years, the NYSE Arca Tech 100 Index has been tracked since 1982, when it was initiated by the Pacific Exchange.