Grey box

Grey box or Grey Box may refer to:

• Grey box (container), a rigid plastic container used to collect materials such as cardboard and newspapers.
• Grey box identification method, used to model industrial processes
• Software Grey Box Testing

It may also a number of 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)
• 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)