Colossally abundant number

IJK or ijk may refer to:

• International Youth Congress of Esperanto
• Izhevsk Airport - IATA code
• Y-Chromosomal Haplogroup "IJK"
• Unit vectors in the Cartesian coordinates are denoted by $\mathbf {\hat {\boldsymbol {\imath }}}$, $\mathbf {\hat {\boldsymbol {\jmath }}}$ and $\mathbf {\hat {\boldsymbol {k}}}$ where $\mathbf {\hat {\boldsymbol {\imath }}} ={\begin{bmatrix}1\\0\\0\end{bmatrix}},\,\,\mathbf {\hat {\boldsymbol {\jmath }}} ={\begin{bmatrix}0\\1\\0\end{bmatrix}},\,\,\mathbf {\hat {\boldsymbol {k}}} ={\begin{bmatrix}0\\0\\1\end{bmatrix}}$
• Unit quaternions, similarly, are typically represented by i, j, and k.
• Indhiya Jananayaga Katchi, a political party in Tamilnadu, South India

Template:Disambiguation