Mr. Foley, Would you explain the differences between all the 737s from the 100 series to the 800 series, or is that too long a subject? Thanks, Bob BOB FLETCHER US ARMY CORPS OF ENGINEERS MILITARY DESIGN SECTION 10th FLOOR S.W. SACRAMENTO DISTRICT 1325 J STREET, SACRAMENTO CALIFORNIA, 95814-2922 Phone (916) 557-7235