Nested doll (TRIZ Keyword)

Nesting, or placing things inside other things, can save space and can solve problems. Think about:

• Nesting
• Stacking
• Mozaic patterns
• Onion layers
• Shaft in a shaft
• Bearing in a bearing
• Protecting outer layer
• (Hidden) system levels
• Layered interface (cleaned up first stage, more depth as you go further)

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