Presstek Reports Improved Sequential First Quarter 2011 Revenue and Profit

Information Regarding Non-GAAP Measures In addition to reporting financial results in accordance with generally accepted accounting principles, or GAAP, the Company provides non-GAAP financial measures, including operating expenses excluding special charges; adjusted EBITDA; debt net of cash; and other GAAP measures adjusted for certain charges, which the Company believes are useful to help investors better understand its past financial performance and prospects for the future. A full reconciliation of GAAP to non-GAAP measures is provided in the financial tables below. Supplemental financial information has been provided with this release to provide additional details on the Company's performance.