2-4 Enterprise Architecture and Information Infrastructure

This handbook applies to the entire Postal Service enterprise architecture, which provides the framework for our business solutions and supports our information technology infrastructure. The Information technology infrastructure includes both text and data and the technology used to present them.

All Postal Service applications must be registered in the Enterprise Information Repository (EIR) at http://eir. The information in the EIR will be used to report compliance and includes any related Section 508 noncompliance issues.