Thank you very much for your assistance in helping us complete our research credit fact gathering process. Although this process is detailed, it is extremely critical that this information be completed to support National Semiconductor's ("NSC's") research tax credits. Because of the technical nature of the information required, we cannot complete this process without your valued assistance. We are reviewing the Company's fiscal year 2006 information (May 30, 2005 through May 28, 2006).

Our goal is to determine the percentage of time spent by your cost center on "qualified research", as defined in Internal Revenue Code section 41. We will determine the amount of qualified research expenses based on your reporting of the percentage of time spent by your cost center personnel on various activities. You are responsible for completing the survey for each cost center listed below.