We believe EBITDA and Adjusted EBITDA are frequently used by securities analysts, investors and other interested parties in the evaluation of companies in industries similar to ours. Adjusted EBITDA is also used by management to measure operating performance and by investors to measure a company's ability to service its debt and other cash needs. Management believes the inclusion of the adjustments to EBITDA and Adjusted EBITDA are appropriate to provide additional information to investors about certain material non-cash items and about unusual items that we do not expect to continue at the same level in the future.
EBITDA and Adjusted EBITDA are not recognized terms under accounting principles generally accepted in the United States, or U.S. GAAP. Accordingly, they should not be used as an indicator of, or alternative to, net income as a measure of operating performance. Although we use EBITDA and Adjusted EBITDA as measures to assess the operating performance of our business, EBITDA and Adjusted EBITDA have significant limitations as analytical tools because they exclude certain material costs. For example, they do not include interest expense, which has been a necessary element of our costs. Since we use capital assets, depreciation expense is a necessary element of our costs and ability to generate service revenues. In addition, the omission of the substantial amortization expense associated with our intangible assets further limits the usefulness of this measure. EBITDA and Adjusted EBITDA also do not include the payment of taxes, which is also a necessary element of our operations. Because EBITDA and Adjusted EBITDA do not account for these expenses, its utility as a measure of our operating performance has material limitations. Due to these limitations, management does not view EBITDA and Adjusted EBITDA in isolation or as a primary performance measure and also uses other measures, such as net income. Because the definitions of EBITDA and Adjusted EBITDA (or similar measures) may vary among companies and industries, they may not be comparable to other similarly titled measures used by other companies.