The Leading Post-Presort Mail Processing software.
Unrivaled Mail.dat® File Management.
Intelligent Mail Barcode Support.
USPS PostalOne!® Integration & Postal Statements Generation.

SAVE on USPS Rates for Domestic & International Shipping. When Shipping 50, 500, or 5,000 Packages daily you can Save Up To 3.5% when Using Commercial Rates over Retail. Support for Most Special Services. Optional Priority Mail Open & Distribute.

Knowledge and the right software are your biggest allies in making your mailing and shipping activities more efficient and cost effective. These indispensable tools will help you Save Time and Money with all your Mailing and Shipping needs. 

Whether you're a mailer or shipper, we have the right software applications, scales, printers, scanners, and supplies, to make your mailing and shipping operations more efficient with the United States Postal Service.

Window Book, Inc offers Online Tools and Custom Services to US Postal Service® Sales Representatives and Employees.