System call
IN COMPUTER SCIENCE, THE MECHANISM USED BY AN APPLICATION PROGRAM TO REQUEST SERVICE FROM THE OPERATING SYSTEM OR ANOTHER APPLICATION PROGRAM
System calls; Syscall; System Call; Int 0x80; INT 0x80
In computing, a system call (commonly abbreviated to syscall) is the programmatic way in which a computer program requests a service from the kernel of the operating system on which it is executed. This may include hardware-related services (for example, accessing a hard disk drive or accessing the device's camera), creation and execution of new processes, and communication with integral kernel services such as process scheduling.