Related:

• Systems have black boxes.
• blue box n. 1. obs. Once upon a time, before all-digital switches made it possible for the phone companies to move them out of band
  one could actually hear the switching tones used to route long-distance calls....
• You know that little indestructible black box that is used on plane
  why can't they make the whole plane out of the same substance?...
• Why are there no black M&M's?
• Hm! She is made of harder stuff!
• Such stuff drams are made of. -- Sleeping Beauty
• Quantum particles: The dreams that stuff is made of.
• Obtain a gross of small white boxes such as are used for a bride's cake.
  Cut the turkey into small squares, roast, stuff, kill, boil, bake, and allow to skewer....
• Quantum particles: the dreams that stuff is made of. -- David Mose