GSI supplies precision technology to the global medical, electronics, and industrial markets and semiconductor systems.

Excel designs, develops, manufactures and markets laser systems and electro-optical components for research and industry.

For the twelve months ended Dec. 31, 2007, Excel reported revenues of $160.0 million and net income of $17.7 million. For the same period, GSI Group Inc. reported revenues of $317.8 million and net income of $19.0 million.

GSI reaffirmed that its second quarter results will be slightly above the midpoint of the previously stated range with revenue expected between $64.0 million and $68.0 million and earnings per share of approximately two cents.