Encyclopedias, Almanacs, Transcripts, and Maps
- Ŭich'ŏn
- Ŭisang
- UK Prime Ministers
- Ukko
- Ülgen
- ultra high frequency
- Umai
- Umāpati Śivācārya
- umbrella bird
- Ummah
- UN
- Unarius Academy of Science
- Uncertainty in Science, Statistics
- underground railway
- Underhill, Evelyn
- Ungarinyin Religion
- Ungulate Domestication
- Uniate Churches
- unified field theory
- Union of Concerned Scientists