系统软件 操作系统 释文 swap-in 换入
- National Award for Natural Sciences
- National Award for Science and Technology Progress
- National Award for Technological Invention
- National Award of Excellent Script for Drama and Opera
- national balance sheet
- National Ballet of China
- National Bank Act
- National Bank of Costa Rica
- National Bank of Cuba
- National Bank of Nicaragua
- National Bank of Panama
- National Bardo Museum
- National Basic Medical Insurance, Industrial Injury Insurance and Maternity Insurance Drug Catalog（China）
- National Basic Population Information Database
- national basic public health service project management platform
- National Basic Research Program of China (973 Program)
- National Basketball Association
- National Beauty and Heavenly Fragrance
- National Beiping Academy
- National Beiping Art School
- national bibliography
- National Bibliography of New Books
- National Biosafety Committee of Agricultural Genetically Modified Organisms
- National bond guaranteed on import surtax
- national bonds