| 31. | There are also compilers that compile Common Lisp code to C code.
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| 32. | Common Lisp is used in many commercial applications, including the Yahoo!
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| 33. | It allows easy access to several hundred libraries written in Common Lisp.
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| 34. | Each library is implemented using one or more Emacs Lisp source files.
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| 35. | The interchangeability of code and data gives Lisp its instantly recognizable syntax.
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| 36. | Lisp was first implemented by Steve Russell on an IBM 704 computer.
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| 37. | Lisp introduced the concept of heap looking for unused memory.
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| 38. | Lisp uses this to implement a very powerful macro system.
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| 39. | However, most substantial Lisp systems also include a compiler.
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| 40. | One of LISP's major data structures is the linked list.
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