Related:

• Spare Parts Principle The accessibility, during recovery of small parts which fall from the work bench
  varies directly with the size of the part and inversely with its importance to the completion of work underway....
• The accessibility, during recovery of small parts that fall from the workbench, varies directly with the size of the part -- and inversely with its importance to the completion of work underway.
  -- The First Spare Parts Principle...
• Digital circuits are made from analog parts.
• No moving parts!
• Law of Arbitrary Distinction: Anything may be divided into as many parts as you please.
• A chase always involves two parts: first breaking contact, second the retiring action to divorce oneself from the incident.
  -- Robert A. Heinlei...
• I always have parts left over when working on my car!
• Digital circuits are made from analog parts. -- Don Vonada