'( 1. This is a list: ( ). Everything is a list. Data structures are all lists. 2. A program is a list of function calls 3. Function calls are lists

'( 1. This is a list: ( ). Everything is a list. Data structures are all lists. 2. A program is a list of function calls 3. Function calls are lists of instructions and parameters. For (A B C), A is the function name, B and C are parameters. 4. If you don't want to execute a list as a function, but as data, you 'quote' it using a single quote mark '(A B C) 5. Data is code, code is data.)