Question

What are System Calls?

Answer 1

A system cell was one of the basic units of imperial Intelligence. Millions of system cells were deployed by Imperial Intelligence, existing on virtually every habitable world in tje galaxy and even those uninhabited worlds with strategic or tactical value. System cells were generally staffed by between four and twenty personnel, although the number could range for one individual to a hundred. Personnel was often recruited from the planet on which it was based, with off-world training a rarity.

Answer 2

In computing, a system call is the programmatic way in which a computer program requests a service from the kernel of the operating system it is executed on. This may include hardware-related services (for example, accessing a hard disk drive), creation and execution of new processes, and communication with integral kernel servicessuch as process scheduling. System calls provide an essential interface between a process and the operating system.

In most systems, system calls can only be made from userspace processes, while in some systems, OS/360 and successors for example, privileged system code also issues system calls.[1]