J. Fred Bucy, Jr.

J. Fred Bucy, Jr. has served as a director of the Company since 1993. Mr. Bucy was employed in various technical and managerial capacities by Texas Instruments Inc. from 1953 through to his retirement in 1985. At the time of his retirement, Mr. Bucy was President, Chief Executive Officer and a director of Texas Instruments. Mr. Bucy was a Trustee of Southwest Research Institute. He was Chairman of the Texas National Research Laboratory Commission (re-appointed by George W. Bush in 1995) until 2001. Mr. Bucy was also a member of the Coordinating Board Advisory Committee on Research of the Texas College and University System and a former member of the Board of Regents of Texas Tech University and Texas Tech University Health Sciences Center from 1973 to 1991, including four years as its Chairman. Mr. Bucy has been accorded Distinguished Alumnus and Distinguished Engineer Awards by Texas Tech University, is a fellow of the Institute of Electrical and Electronics Engineers, a member of National Academy of Engineers, and is a life member of the Navy League. Mr. Bucy was awarded an honorary Doctor of Science degree from Texas Tech University in 1994. Mr. Bucy was recognized as an Eminent Member of Eta Kappa Nu in 2002.

James F. Gero

James F. Gero was named a director of the Company on October 27, 2003. Mr. Gero is former Chairman of the Board and a principal stockholder of Sierra Technologies, Inc., which was formed in September 1991, and is a private investor. Mr. Gero serves on the Boards of Drew Industries, a public company which supplies a broad array of components for recreational vehicles and manufactured homes, and is Chairman of Orthofix, N.V., a publicly traded medical device manufacturer. Mr. Gero is a former Chairman and Chief Executive Officer of Varo Inc., a manufacturer of high technology systems. Prior to becoming Chairman and CEO of Varo Inc., Mr. Gero served as Vice President and General Manager at Allied Signal Corporation. Mr. Gero holds a B.S. degree from State University of New York, an M.B.A. degree from University of New Haven and an M.A. degree from Fairleigh Dickinson.

Donald M. Johnston

Donald M. Johnston has served as a director of the Company since November 1983. Mr. Johnston is President of Massey Burch Capital Corp., a venture capital firm. He served as President of Massey Burch Investment Group, Inc., a venture capital firm, from 1990 until December 1993 where he had been a principal since 1982. Prior to that time, Mr. Johnston was the President of InterFirst Venture Corporation, a venture capital subsidiary of Interfirst Bancshares, Inc., and the Executive Director of First Dallas, Ltd., a corporate finance group in London, England. Mr. Johnston holds a B.A. degree from Vanderbilt University and an M.B.A. degree from Southern Methodist University.