Magento Commerce, 1.14.x

Magento 1.x Software Support Notice
For Magento Commerce 1, Magento is providing software support through June 2020. Depending on your Magento Commerce 1 version, software support may include both quality fixes and security patches. Please review our Magento Software Lifecycle Policy to see how your version of Magento Commerce 1 is supported.

USPS

The United States Postal Service is the independent postal service of United States government, offering domestic and international shipping services by land and air.

On January 17, 2016, USPS made changes to their services, rates, and package names. The updates are included in the Magento Enterprise Edition 1.14.2.3 release.