The interface of C++ standard library is defined by the following collection of header files.
|  Utilities library | 
| <cstdlib> | General purpose utilities:  program control,  dynamic memory allocation,  random numbers,  sort and search | 
| <csignal> | Functions and macro constants for signal management | 
| <csetjmp> | Macro (and function) that saves (and jumps) to an execution context | 
| <cstdarg> | Handling of variable length argument lists | 
| <typeinfo> | Runtime type information utilities | 
| <typeindex>(since C++11) | std::type_index | 
| <type_traits>(since C++11) | Compile-time type information | 
| <bitset> | std::bitset class template | 
| <functional> | Function objects, designed for use with the  standard algorithms | 
| <utility> | Various  utility components | 
| <ctime> | C-style time/date utilites | 
| <chrono>(since C++11) | C++ time utilites | 
| <cstddef> | typedefs for types such as size_t, NULL and others | 
| <initializer_list>(since C++11) | std::initializer_list class template | 
| <tuple>(since C++11) | std::tuple class template | 
|   Dynamic memory management  | 
| <new> | Low-level memory management utilities | 
| <memory> | Higher level memory management utilities | 
| <scoped_allocator>(since C++11) | Nested allocator class | 
|   Numeric limits  | 
| <climits> | limits of integral types | 
| <cfloat> | limits of float types | 
| <cstdint>(since C++11) | fixed-size types and  limits of other types | 
| <cinttypes>(since C++11) | formatting macros , intmax_tanduintmax_tmath and conversions | 
| <limits> | standardized way to query properties of fundamental types | 
|   Error handling  | 
| <exception> | Exception handling utilities | 
| <stdexcept> | Standard exception objects | 
| <cassert> | Conditionally compiled macro that compares its argument to zero | 
| <system_error>(since C++11) | defines std::error_code, a platform-dependent error code | 
| <cerrno> | Macro containing the last error number | 
|  Strings library | 
| <cctype> | functions to determine the type contained in character data | 
| <cwctype> | functions for determining the type of wide character data | 
| <cstring> | various  narrow character string handling functions | 
| <cwchar> | various  wide  and  multibyte string handling functions | 
| <cuchar>(since C++11) | C-style  Unicode character conversion functions | 
| <string> | std::basic_string class template | 
|  Containers library | 
| <array>(since C++11) | std::array container | 
| <vector> | std::vector container | 
| <deque> | std::deque container | 
| <list> | std::list container | 
| <forward_list>(since C++11) | std::forward_list container | 
| <set> | std::set and std::multiset associative containers | 
| <map> | std::map and std::multimap associative containers | 
| <unordered_set>(since C++11) | std::unordered_set and std::unordered_multiset unordered associative containers | 
| <unordered_map>(since C++11) | std::unordered_map and std::unordered_multimap unordered associative containers | 
| <stack> | std::stack container adaptor | 
| <queue> | std::queue and std::priority_queue container adaptors | 
|  Algorithms library | 
| <algorithm> | Algorithms that operate on containers | 
|  Iterators library | 
| <iterator> | Container iterators | 
|  Numerics library | 
| <cmath> | Common mathematics functions | 
| <complex> | Complex number type | 
| <valarray> | Class for representing and manipulating arrays of values | 
| <random>(since C++11) | Random number generators and distributions | 
| <numeric> | Numeric operations on values in containers | 
| <ratio>(since C++11) | Compile-time rational arithmetic | 
| <cfenv>(since C++11) | Floating-point environment access functions | 
|  Input/output library | 
| <iosfwd> | forward declarations of all classes in the input/output library | 
| <ios> | std::ios_base class, std::basic_ios class template and several typedefs | 
| <istream> | std::basic_istream class template and several typedefs | 
| <ostream> | std::basic_ostream, std::basic_iostream class templates and several typedefs | 
| <iostream> | several standard stream objects | 
| <fstream> | std::basic_fstream, std::basic_ifstream, std::basic_ofstream class templates and several typedefs | 
| <sstream> | std::basic_stringstream, std::basic_istringstream, std::basic_ostringstream class templates and several typedefs | 
| <strstream> | std::strstream, std::istrstream, std::ostrstream(deprecated) | 
| <iomanip> | Helper functions to control the format or input and output | 
| <streambuf> | std::basic_streambuf class template | 
| <cstdio> | C-style input-output functions | 
|  Localization library | 
| <locale> | Localization utilities | 
| <clocale> | C localization utilities | 
| <codecvt>(since C++11) | Unicode conversion facilities | 
|  Regular Expressions library | 
| <regex>(since C++11) | Classes, algorithms and iterators to support regular expression processing | 
|  Atomic Operations library | 
| <atomic>(since C++11) | Atomic operations library | 
|  Thread support library | 
| <thread>(since C++11) | std::thread class and  supporting functions | 
| <mutex>(since C++11) | mutual exclusion primitives | 
| <shared_mutex>(since C++14) | shared mutual exclusion primitives | 
| <future>(since C++11) | primitives for asynchronous computations | 
| <condition_variable>(since C++11) | thread waiting conditions | 
|  Experimental libraries | 
| <experimental/algorithm>(library fundamentals TS) | Standard libraries extensions and  Extensions for Parallelism | 
| <experimental/any>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/chrono>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/deque>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/execution_policy>(parallelism TS) | Extensions for Parallelism | 
| <experimental/exception_list>(parallelism TS) | Extensions for Parallelism | 
| <experimental/filesystem>(filesystem TS) | Filesystem library | 
| <experimental/forward_list>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/future>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/list>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/functional>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/map>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/memory>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/memory_resource>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/numeric>(parallelism TS) | Extensions for Parallelism | 
| <experimental/optional>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/ratio>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/regex>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/set>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/string>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/string_view>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/system_error>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/tuple>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/type_traits>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/unordered_map>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/unordered_set>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/utility>(library fundamentals TS) | Standard libraries extensions | 
| <experimental/vector>(library fundamentals TS) | Standard libraries extensions | 
|   | 
| <ciso646> | empty header. The macros that appear in iso646.hin C are keywords in C++ | 
| <ccomplex>(since C++11) | simply includes the header <complex> | 
| <ctgmath>(since C++11) | simply includes the headers <ccomplex> and <cmath>: the overloads equivalent to the contents of the C header tgmath.hare already provided by <cmath> and <complex> | 
| <cstdalign>(since C++11) | defines one compatibility macro constant | 
| <cstdbool>(since C++11) | defines one compatibility macro constant | 
|   | 
| <assert.h>(deprecated) | behaves as if each name from <cassert> is placed in global namespace | 
| <complex.h>(deprecated) | behaves as if each name from <ccomplex>  is placed in global namespace | 
| <ctype.h>(deprecated) | behaves as if each name from <cctype> is placed in global namespace | 
| <errno.h>(deprecated) | behaves as if each name from <cerrno> is placed in global namespace | 
| <fenv.h>(deprecated) | behaves as if each name from <cfenv> is placed in global namespace | 
| <float.h>(deprecated) | behaves as if each name from <cfloat> is placed in global namespace | 
| <inttypes.h>(deprecated) | behaves as if each name from <cinttypes> is placed in global namespace | 
| <iso646.h>(deprecated) | behaves as if each name from <ciso646> is placed in global namespace | 
| <limits.h>(deprecated) | behaves as if each name from <climits> is placed in global namespace | 
| <locale.h>(deprecated) | behaves as if each name from <clocale> is placed in global namespace | 
| <math.h>(deprecated) | behaves as if each name from <cmath> is placed in global namespace | 
| <setjmp.h>(deprecated) | behaves as if each name from <csetjmp> is placed in global namespace | 
| <signal.h>(deprecated) | behaves as if each name from <csignal> is placed in global namespace | 
| <stdalign.h>(deprecated) | behaves as if each name from <cstdalign> is placed in global namespace | 
| <stdarg.h>(deprecated) | behaves as if each name from <cstdarg> is placed in global namespace | 
| <stdbool.h>(deprecated) | behaves as if each name from <cstdbool> is placed in global namespace | 
| <stddef.h>(deprecated) | behaves as if each name from <cstddef> is placed in global namespace | 
| <stdint.h>(deprecated) | behaves as if each name from <cstdint> is placed in global namespace | 
| <stdio.h>(deprecated) | behaves as if each name from <cstdio> is placed in global namespace | 
| <stdlib.h>(deprecated) | behaves as if each name from <cstdlib> is placed in global namespace | 
| <string.h>(deprecated) | behaves as if each name from <cstring> is placed in global namespace | 
| <tgmath.h>(deprecated) | behaves as if each name from <ctgmath> is placed in global namespace | 
| <time.h>(deprecated) | behaves as if each name from <ctime> is placed in global namespace | 
| <uchar.h>(deprecated) | behaves as if each name from <cuchar> is placed in global namespace | 
| <wchar.h>(deprecated) | behaves as if each name from <cwchar> is placed in global namespace | 
| <wctype.h>(deprecated) | behaves as if each name from <cwctype> is placed in global namespace |