Joint electronics device
In a simplified form, a human body is a system - the brain is the computer (CPU). Without the other parts,organ e.t.c there is no SYSTEM, hence no HUMAN. SAME with COMPUTER AND a COMPUTER SYSTEM.
A COMPUTER is specifically a Central Processing Unit (CPU). A computer System refer to series of peripheral put together to function as a whole. A typical example is the system unit, monitor, keyboard, scanner,mouse, joystick,printer e.t.c; put together to function as a unit. While a computer is mere an electronic device receiving data, storing and processing it for information (SYSTEM UNIT). The peripherals are accessories and constitutes a COMPUTER SYSTEM. Otherwise, each unit is incapable to function and achieve a specified task.