Describe The Computer. The two principal characteristics of a computer are: It responds to a specific set of instructions in a well-defined manner and it can execute a prerecorded list of instructions (a program). It is designed to execute applications and provides a variety of solutions by combining integrated hardware and software components. • Analog Computer: A computer that represents numbers by some continuously variable physical quantity, whose variations mimic the properties of some system being modeled. • Personal computer: A personal computer is a computer small and low cost.
The use of computer can reduce the time that is spent on preparing teaching material. A desktop case lies flat on a desk, and the monitor usually sits on top of it. Computer hardware is a general term to describe all the physical parts of a computer system.
INPUT DEVICES Computer System: A computer system is a basic, complete and functional computer, including all the hardware and software required to make it functional for any user.
The front of the case usually has an On/Off button and one or more optical drives.
Hardware are the physical components of a computer like the processor, memory devices, monitor, keyboard etc. while software is the set of programs or instructions that are required by the hardware resources to function properly. A computer system is a set of integrated devices that input, output, process, and store data and information. For example, asking the computer to draw a square requires a set of instructions telling the computer how to draw the square.