Exhibit 10 June 27, 1997 Mr. George Conrades 3 Channing Place Cambridge, MA 02138 Dear George: I want to let you know how pleased and excited I am that you will continue to lead BBN Corporation ("BBN") as it integrates with the data strategy of GTE...Letter Agreement • August 13th, 1997 • Gte Corp • Telephone communications (no radiotelephone)
