This document provides an overview and summary of the International Traffic in Arms Regulations (ITAR) handbook. It explains that the handbook is intended as a reference guide for readers, and contains the official versions of the ITAR regulations as well as additional tables, indexes, and summaries to aid the reader. The document notes that the handbook contains changes to the ITAR through May 2013 as well as provisions related to export control reforms. It also provides contact information for questions about the ITAR or handbook.