计算机硬件 输入输出设备 释文 optical character reader, OCR 光学字符阅读器 计算机硬件 输入输出设备 释文 optical character reader, OCR 光学字符阅读器
- U.K. Postal Services Commission
- Ukraine aviation
- Ukraine Central Rada
- Ukraine, cinema in
- Ukraine space activities
- Ukrainian language
- Ukrainian Literature
- Ukrainian music
- Ukrainians
- UK Schmidt Telescope
- UKST
- UK TV licence fee
- UKWAC
- U.K. Water Services Office
- UK Web Archiving Consortium
- U Kyin U
- UL
- Ulaanbaatar
- Ulaangom
- ulaan mochir
- Ulabun, traditional Manchu storytelling
- Ulam
- Ulam conjecture
- Ulam map
- Ulam mapping