The US Munitions List (USML) is
the part of the International Traffic in Arms
Regulations or ITAR that defines which defense articles and services are
subject to licensing.
Examples of these types of exports include
military equipment, military and space electronics, computers designed for
military application, cryptographic techniques and encryption software.
The Directorate of Defense Trade Controls
is the principal U.S. government agency which oversees ITAR licensing.
Under ITAR, both exporters and manufacturers or providers of defense articles and/or services
(whether exporting or not) are required to be registered with the U.S. government.