> The C++ standard library (also know as the STL)
The C++ Standard Library is not the same as the STL.
The STL is the Standard Template Library, which provides containers such as vectors, as well as related functionality like iterators.
The C++ Standard Library includes STL, but is a lot more, including things like I/O, math, concurrency, and so on.
The maintainers of Microsoft's C++ standard library use the term interchangeably, both "STL" and "C++ standard library" refer to the same thing. https://github.com/microsoft/STL/blame/main/README.md#L3