calling system with linux and C

I figured that much out when I was trying to use system("cls"); to clear previous terminal garbage. I'm sure system calls are listed somewhere for linux and windows 7. Let me know if anyone finds them because I have had no luck looking for them.

... system is a function used to execute subprocesses and commands ...

#include <stdio.h> // requred for printf.
#include <stdlib.h> // required for system.

// See http://en.wikipedia.org/wiki/System_%28C_standard_library%29

int main( int   argc, char *argv[] ){
    printf ("Text to print.");
    getchar();
    system("clear"); // clear is a terminal command in Linux. /usr/bin/clear    
    return 0;
}

Because, "system" is a library, which can be used to execute any shell commands from program,if we want. So, I won't say "system" is a system call. just my opinion Aron.

Well, according to me,

nread=read(,,,,)

is a system call.

It should be noted that the terms "system call" and "syscall" are often incorrectly used to refer to the aforementioned C standard library functions, particularly those that act as a wrapper to corresponding system calls with the same name.

And thanks for the link Aron.

Richard, if you want Dennis Ritchie book soft copy, let me to know. I have that.