Notice. All notices, instructions and other communications given hereunder or in connection herewith shall be in writing. Any such notice, instruction or communication shall be sent either # by registered or certified mail, return receipt requested, postage prepaid, or # prepaid via a reputable nationwide overnight courier service, in each case addressed to the Company, Attention: CEO, at One Technology Park Drive, Westford, Massachusetts 01886 and to the Executive at the Executive’s principal residence as currently reflected on the Company’s records (or to such other address as either the Company or the Executive may have furnished to the other in writing in accordance herewith). Any such notice, instruction or communication shall be deemed to have been delivered five business days after it is sent by registered or certified mail, return receipt requested, postage prepaid, or one business day after it is sent via a reputable nationwide overnight courier service. Either party may give any notice, instruction or other communication hereunder using any other means, but no such notice, instruction or other communication shall be deemed to have been duly delivered unless and until it actually is received by the party for whom it is intended.

Notices. All communications provided for herein shall be in writing and shall be deemed to have been duly given when delivered or five (5) business days after having been mailed by United States registered or certified mail, return receipt requested, postage prepaid, addressed to the Company (to the attention of the Secretary of the Company) at its principal executive office and to the Executive at his/her principal residence, or to such other address as any parry may have furnished to the other in writing in accordance herewith, except that notices of a change of address shall be effective only upon receipt.