A computer system is sometimes subdivided into two functional entities: hardware and software.
The hardware of the computer consists of all the electronic components and electromechanical devices
that comprise the physical entity of the device.
Computer software consists of the instructions and data that the computer manipulates to perform
various data-processing tasks. Program A sequence of instructions for the computer is called a
program. The data that are manipulated by the program constitute the data base.
Computer organization is concerned with the way the hardware components operate and the way they
are connected together to form the computer system. The various components are assumed to be in
place and the task is to investigate the organizat ional structure to verify that the computer parts
operate as intended.
Computer design is concerned with the hardware design of the computer. Once the computer
specifications are formulated, it is the task of the designer to develop hardware for the system.
Computer design is concerned with the determination of what hardware should be used and how the
parts should be connected. This aspect of computer hardware is sometimes referred to as computer