National Instruments Declares Quarterly Dividend

Board Approves New Stock Repurchase Program

AUSTIN, Texas – April 29, 2008 - The National Instruments (Nasdaq: NATI) Board of Directors declared a dividend of $0.11 cents per share on its common stock payable on June 2, 2008, to shareholders of record on May 12, 2008.

NI also announced today that the board of directors approved a new stock repurchase plan that increases the number of shares the company is authorized to repurchase by 2.2 million to 3 million shares. This new stock repurchase program does not have an expiration date.

About National Instruments

National Instruments (www.ni.com) is transforming the way engineers and scientists design, prototype and deploy systems for measurement, automation and embedded applications. NI empowers customers with off-the-shelf software such as NI LabVIEW and modular cost-effective hardware, and sells to a broad base of more than 25,000 different companies worldwide, with no one customer representing more than 3 percent of revenue and no one industry representing more than 10 percent of revenue. Headquartered in Austin, Texas, NI has more than 4,800 employees and direct operations in nearly 40 countries. For the past nine years, FORTUNE magazine has named NI one of the 100 best companies to work for in America. Readers can obtain investment information from the company’s investor relations department by calling (512) 683-5090, e-mailing nati@ni.com or visiting www.ni.com/nati.

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