We supplement the reporting of our financial information determined under U.S. generally accepted accounting principles (GAAP) with certain non-GAAP financial measures. These non-GAAP financial measures exclude certain significant items that may not be indicative of, or are unrelated to, results from our ongoing business operations. We believe that these non-GAAP measures may be useful for period-over-period comparisons of underlying business trends and our ongoing business performance, however, they should be used in conjunction with GAAP measures. Our non-GAAP measures should not be considered in isolation or as a substitute for the related GAAP measures, and other companies may define similarly named measures differently. We encourage investors to review our financial statements and publicly-filed reports in their entirety and not to rely on any single financial measure. We utilize the following definitions for the non-GAAP financial measures included in this release and have provided a reconciliation of the GAAP to non-GAAP amounts for each measure:

Adjusted Income from Continuing Operations and Adjusted Diluted Earnings Per Share

Adjusted income from continuing operations and adjusted diluted earnings per share exclude special charges, net of tax. We consider items recorded in special charges, such as enterprise-wide restructuring, certain asset impairment charges, and acquisition-related restructuring, integration and transaction costs, to be of a non-recurring nature that is not indicative of ongoing operations. In addition, we have excluded certain impacts of the enterprise-wide restructuring plan on TRU Simulation + Training Canada Inc. (TRU Canada) that are not included within special charges, but are of a non-recurring nature and are not indicative of ongoing operations. At TRU Canada, an inventory charge is excluded as it relates to the write-down of inventory in connection with an action taken under the restructuring plan. Due to the substantial decline in demand and order cancellations for flight simulators resulting from the impact of the pandemic on the commercial air transportation business, we ceased manufacturing at TRU Canada’s Montreal facility, resulting in the production suspension of its commercial air transport simulators. As a result of this action and market conditions, the related inventory was written down to its net realizable value in the second quarter of 2020. In the first quarter of 2021, TRU Canada was sold and the after-tax gain is excluded as it was incurred in connection with the enterprise-wide restructuring plan.