国际语言环境指南
    
U
 
 UIL ( Index Term Link ) ( Index Term Link )
 
 Unicode
  概述 ( Index Term Link ) ( Index Term Link )
  十六进制输入模式 ( Index Term Link ) ( Index Term Link )
  转换模块 ( Index Term Link ) ( Index Term Link )
 
 UTC ( Index Term Link ) ( Index Term Link )
 
 UTF-8, 支持 ( Index Term Link ) ( Index Term Link )