Describe why C is important

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   * /dev
   * /usr: unchanging data.
   * /var: changing data like logs
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+# Identify the importance of programming Unix in C
+
+The C programming language was developed in the 1970's around the same time that
+the original UNIX was being built and designed. C provides low level constructs
+that allow programmers to decide how to allocate and deallocate memory. This
+level of efficiency is necessary for building the Kernel that most software
+programs depend on. The system call interface is exposed through man pages and
+header files. libc is the standard interface for making system calls into the
+kernel.