What does USA stand for?

USA stands for Used by Agencies

This definition appears somewhat frequently

Other Resources: Acronym Finder has 58 verified definitions for USA

Samples in periodicals archive:

The Official PhaZZer Electronics Store - The TASER® Alternative. PhaZZer Develops Law Enforcement and Security Products Used By Agencies Worldwide.

The Script Timeline. Script coverage is the summary and analysis of a script's plot and writing quality, used by agencies and production companies to track film and...