Net income (loss) from continuing operations (a GAAP measure) before income taxes, interest expense, foreign exchange gain (loss), other non-operating expenses, depreciation, impairment losses, amortization (service revenue, purchase accounting and non-purchase accounting), restructuring expenses, stock-based compensation, litigation expense (income), and certain other non-recurring items. Other non-recurring items are infrequent in nature and are not reflective of ongoing operational activities. Management believes Adjusted EBITDA is useful in providing period-to-period comparisons of the results of the Company’s ongoing operational performance.