Systems in Wonderland

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Consider a deck of cards and the different ways to group its parts. 

• The deck is one whole but could also be a part of a larger multi-deck game. 
• Or grouped into parts in different ways.
• You can group them via suit.
• There are face cards and number cards.
• Each individual card is a part.
• Even an individual card has parts on it such as a number and its suit, and a front and a back.