The metal is also made of category theory: http://conal.net/blog/posts/circuits-as-a-bicartesian-closed-category http://conal.net/blog/posts/circuits-as-a-bica

The metal is also made of category theory: http://conal.net/blog/posts/circuits-as-a-bicartesian-closed-category http://conal.net/blog/posts/circuits-as-a-bicartesian-closed...