What are some examples of system calls including wrapper fun

What are some examples of system calls (including wrapper functions) and libraries in system programming?

Examples for system calls

On Unix,Unix-Like and extra -compliant operating systems,famous system calls are close,open,read,write,wait,exec,fork and kill.

Example:Linux and openBSD individually across 300 discrete calls.NETBSD is close to 500.FreeBSD across 500 and windows is close for 500.

Examples for system libraries(including wrapper functions)

1.pthreads for WIN32.

2.JavaCV

3.MYSQL++

4.open JL bindings for python.