系统软件 操作系统 释文 multitasking 多任务处理
- National Broadcasting Company， NBC
- National Broadcasting Services of Thailand
- National Bureau of Corruption Prevention
- National Bureau of Economic Research
- National Bureau of Standards
- National Bureau of Statistics of China
- national business cycle analysis
- National Calligraphy and Seal Carving Exhibition
- National Calligraphy and Seal Carving Exhibition for Young and Middle-aged Artists
- National Campaign for China's Top Ten Museum Exhibitions
- National Canal Museum
- national capitalism of the transition period in China
- National Center for Agricultural Bio-safety Sciences
- National Center for Atmospheric Research(US)
- National Center for Biotechnology Information
- National Center for Chronic and Non-communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention，NCNCD
- National Center for Educational Technology
- National Center for Foreign Animal Diseases（Canada）
- National Center for Geographic Information and Analysis
- National Center for Nanoscience and Technology，Chinese Academy of Sciences
- National Center for Scientific Research in France
- National Center for Traditional Arts, Yilan County
- National Center for University Works
- National Center of Educational Development Research
- National Center of Geriatrics and Gerontology