• Procedural programming languages
  -- C is an example
  -- Action-oriented
  -- Functions are unit of programming
   
• Object-oriented programming language
  -- Java and C++ are two examples
  -- Everything is an object
  -- A program is a bunch of objects telling each other what to do, by sending messages
  -- Each object has its own memory, and is made up of other objects
  -- Every object has a type (class)
  -- All object of the same type can receive the same messages
   
• Functions, or methods, are encapsulated in classes

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