of January 28, 2007, will be accounted for as a credit to stockholders’ equity, if and when realized. In determining if and when excess tax benefits have been realized, we have elected to do so on a “with-and-without” approach with respect to such excess tax benefits. We have also elected to ignore the indirect tax effects of stock-based compensation deductions for financial and accounting reporting purposes, and specifically to recognize the full effect of the research tax credit in income from continuing operations.

 

Goodwill

 

Our impairment review process compares the fair value of the reporting unit in which the goodwill resides to its carrying value.  We determined that our reporting units are equivalent to our operating segments for the purposes of completing our Statement of Financial Accounting Standards No. 142, or SFAS No. 142, Goodwill and Other Intangible Assets, impairment test.  We utilize a two-step approach to testing goodwill for impairment. The first step tests for possible impairment by applying a fair value-based test. In computing fair value of our reporting units, we use estimates of future revenues, costs and cash flows from such units. The second step, if necessary, measures the amount of such an impairment by applying fair value-based tests to individual assets and liabilities. We elected to perform our annual goodwill impairment review during the fourth quarter of each fiscal year. We completed our most recent annual impairment test during the fourth quarter of fiscal 2007 and concluded that there was no impairment. However, future events or circumstances may result in a charge to earnings in future periods due to the potential for a write-down of goodwill in connection with such tests.



Stock-based Compensation



Effective January 30, 2006, we adopted the provisions of SFAS No. 123(R) which establishes accounting for stock-based awards exchanged for employee services. Accordingly, stock-based compensation cost is measured at grant date, based on the fair value of the awards, and is recognized as expense over the requisite employee service period. Stock-based compensation expense recognized during fiscal 2007 was $116.7 million, which consisted of stock-based compensation expense related to stock options and our employee stock purchase plan. Please refer to Note 2 of the Notes to Consolidated Financial Statements for further information.



We elected to adopt the modified prospective application method beginning January 30, 2006 as provided by SFAS No. 123(R). We recognize stock-based compensation expense using the straight-line attribution method. We estimate the value of employee stock options on the date of grant using a lattice-binomial model. Prior to the adoption of SFAS No. 123(R), we recorded stock-based compensation expense equal to the amount that would have been recognized if the fair value method was used, for the purpose of the pro forma financial information provided in accordance with Statement of Financial Accounting Standards No. 123, or SFAS No. 123, Accounting for Stock-Based Compensation, as amended by SFAS No. 148, Accounting for Stock-Based Compensation - Transition and