Atlantic Data Services Inc Watch

from SC 13G 1 page <page> 1 Exhibit 1 Agreement Pursuant to Rule 13d-1(f)(1) Under the Securities Exchange Act of 1934, the Undersigned Hereby Agree That Only One Statement Containing the Information Required by Schedule 13g Need Be Filed With Respect to the Ownership by Each of the Undersigned of Shares of Common Stock of Atlantic Data Services, Inc. Executed as a Sealed Instrument This 11th Day of February, 1999. February 11, 1999 Date /S/ Robert W. Howe Robert W. Howe /S/ William H. Gallagher William H. Gallagher /S/ Lee M. Kennedy Lee M. Kennedy Page 9 of 10 Pages

from SC 13D 1 page Schedule 13d 048523104 Page 10 of 10 Pages Exhibit 1 to Schedule 13d Joint Acquisition Statement Pursuant to Rule 13d-(F)(1) the Undersigned Acknowledge and Agree That the Foregoing Statement on Schedule 13d Is Filed on Behalf of Each of the Undersigned and That All Subsequent Amendments to This Statement on Schedule 13d Shall Be Filed on Behalf of Each of the Undersigned Without the Necessity of Filing Additional Joint Acquisition Statements. the Undersigned Acknowledge That Each Shall Be Responsible for the Timely Filing of Such Amendments, and for the Completeness and Accuracy of the Information Concerning Him, Her or It Contained Herein, but Shall Not Be Responsible for the Completeness and Accuracy of the Information Concerning the Other Entities or Persons, Except to the Extent That He, She or It Knows or Has Reason to Believe That Such Information Is Accurate. Dated: June 8, 1998 General Atlantic Partners, LLC By: /S/ Nancy E. Cooper Nancy E. Cooper a Managing Member General Atlantic Partners II, L.P. By: General Atlantic Partners, LLC, Its General Partner By: /S/ Nancy E. Cooper Nancy E. Cooper a Managing Member Gap Coinvestment Partners, L.P. By: /S/ Nancy E. Cooper Nancy E. Cooper a Managing Member

from S-1/A ~50 pages Underwriting Agreement