Wide Area Tracking System, a system for detecting ground-based nuclear weapons
local government area | operating system | San Francisco Bay Area | World Wide Web | Super Nintendo Entertainment System | Important Bird Area | Nintendo Entertainment System | Unincorporated area | Android (operating system) | wide receiver | Global Positioning System | Solar System | X Window System | Greater Toronto Area | Urban area | Korean Broadcasting System | World Wide Fund for Nature | metropolitan area | System of a Down | Domain Name System | Wide World of Sports | Seoul Broadcasting System | North Carolina Community College System | New York metropolitan area | Bay Area Rapid Transit | Mutual Broadcasting System | Bulletin board system | system | Turner Broadcasting System | Program and System Information Protocol |