A system call is triggered by hardware!
It sounds to me like you are referring to the kernel of the operating system.
A "System call" you be a function accessible from a programming language to the base hardware of the computer (eg to get the time).
The nervous system is triggered to respond to stimuli.
These physical reactions are triggered by the autonomic nervous system, which controls involuntary bodily functions such as heart rate, digestion, and respiration. The sympathetic branch of the autonomic nervous system is responsible for the "fight or flight" response, while the parasympathetic branch helps the body to relax and recover.
What are the new latest computer hardware system?
The devices that make up a computer system are collectively called computer hardware. A complete computer system must however also have software.
Hardware And Operating System
The operating system (OS) controls the hardware. A successful computer system will have hardware and an operating system. Application software is not required. All operating systems have a low level, or machine language to run the operation system and control all hardware.
email system is a complex of client and server hardware and software
why do signal system call do not work properly on RHEL 5.0. any reasons hardware or software specific?
Hardware