Grey box
# Grey box

Grey or gray box may refer to:

## Science and technology

* Gray box testing, software testing
* Grey box model, in mathematics, statistics, and computational modelling
* Grey identification method, used in system identification

### Botany

* Jojoba (Simmondsia chinensis), also known as gray box bush

**Eucalyptus**

* Grey box, many trees in the genus Eucalyptus, native to Australia, including:
   * Eucalyptus argillacea (Kimberley grey box or northern grey box)
   * Eucalyptus bosistoana (coast grey box or Gippsland grey box)
   * Eucalyptus brownii (grey box)
   * Eucalyptus hemiphloia (grey box); See Eucalyptus albens
   * Eucalyptus largeana (grey box)
   * Eucalyptus microcarpa (grey box, inland grey box or western grey box)
   * Eucalyptus moluccana (grey box or coastal grey box)
   * Eucalyptus normantonensis (grey box)
   * Eucalyptus pilligaensis (narrow-leaved grey box, pilliga grey box)
   * Eucalyptus quadrangulata (grey box)
   * Eucalyptus rummeryi (grey box)
   * Eucalyptus tectifica (grey box)
