Other
- Yi (Cyrillic), the letter of the Ukrainian alphabet written "Ї" and "ї"
- Yi (editor), a text editor written in Haskell
- Yi (Chinese: {{{2}}}), a former name for zun, a traditional bronze drinkware of ancient China
- Yi (vessel) (匜), a different kind of bronze vessel used in traditional rituals in ancient China
- Yi, the abbreviation of the binary prefix "yobi-", representing 280, the equivalent of the decimal prefix "yotta-" (Y)
- Yi (Confucianism), the Confucian virtue roughly equivalent to "righteousness" or "justice"
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