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# C++ Standard Library Reference
A C++ program can call on a large number of functions from this conforming implementation of the C++ Standard Library. These functions perform essential services such as input and output and provide efficient implementations of frequently used operations.  
  
 For more information about Visual C++ run-time libraries, see [CRT Library Features](../c-runtime-library/crt-library-features.md).  
  
## In This Section  
 [C++ Standard Library Overview](../standard-library/cpp-standard-library-overview.md)  
 Provides an overview of the Microsoft implementation of the C++ Standard Library.  
  
 [iostream Programming](../standard-library/iostream-programming.md)  
 Provides an overview of iostream programming.  
  
 [Header Files Reference](../standard-library/cpp-standard-library-header-files.md)  
 Provides links to reference topics discussing the C++ Standard Library header files, with code examples.