# ↑

The symbol **↑**, an **upward pointing arrow**, can refer to:

- Yn, a Romanian Cyrillic letter
- Up arrow key
- For the symbol, represented in Unicode, see Arrow (symbol)
- For the mathematical notation of undefined, see Defined and undefined
- For the mathematical notation of iterated exponentiation, see Knuth's up-arrow notation
- For the mathematical game theory position
*Up*, see Up (game theory) - It also resembles the medieval Roman numeral for 900.
- The Sheffer stroke (logical NAND)
- In medical notation, "increased"; for example, ↑AST means AST level higher than earlier and/or higher than the reference range

## See also

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