Classes of Functions
  Character Manipulation Functions
  Memory Manipulation Functions
  String Manipulation Functions
  Multibyte Character Functions
  Conversion Functions
  Memory Allocation Functions
  Heap Functions
  Math Functions
  Searching Functions
  Time Functions
  Variable-length Argument Lists
  Stream I/O Functions
  Process Primitive Functions
  Process Environment
  Directory Functions
  Operating System I/O Functions
  File Manipulation Functions
  Console I/O Functions
  Default Windowing Functions
  BIOS Functions
  DOS-Specific Functions
  Intel 80x86 Architecture-Specific Functions
  Miscellaneous Functions