1. Parts per million; pages per minute

Encyclopedia: Ppm

• United Nations International Children's Emergency Fund
• United Nations Office for Drug Control and Crime Prevention
• United Nations Protection Force
• United Nations Secretariat
• United Republic of Tanzania
• United Self-Defense Force of Colombia
• United Self-Defense Group of Colombia
• United Society of Believers in Christ's Second Appearing
• United States
• United States Air Force
• United States Air Force Academy
• United States Army
• United States Army Criminal Investigation Laboratory
• United States Army Rangers
• United States Army Special Forces
• United States Attorney General
• United States Border Patrol
• United States Cabinet
• United States Civil War
• United States Coast Guard
• United States Code
• United States Congress
• United States Constitution
• United States Customary System
• United States Department of Defense