Definition & Basic Terms of Computer

A computer is a machine for manipulating data according to a list of instructions known as a program.
1. Computer is electronic device which is use in storage and processing information. Computer is a very fast working
2. A computer is composed of hardware and software, and can exist in a variety of sizes and configurations.
3. A computer that stores retrieve and process data from backend. Give the result on your screen. It is very fast device. Calculation is very fast.

Computer:
Having the characteristics of simulating computer-generated output, such as printout, and illuminated displays.
1. A device that accepts data, processes the data in accordance with a stored program, generates results, and usually consists of input, output, storage, arithmetic, logic, and control units.
2. A functional unit that can perform substantial computation, including numerous arithmetic operations or logic operations, without human intervention during a run.

Data:
Representation of facts, concepts, or instructions in a formalized manner suitable
for communication, interpretation, or processing by humans or by automatic means. Any representations such as characters or analog quantities to which meaning is or might be assigned.

Program:
1. A plan or routine for solving a problem on a computer.
2. A sequence of instructions used by a computer to do a particular job or solve a given
problem. To 3.To design, write, and test programs.

Input output:
Input/output, or I/O, is the collection of interfaces that different functional units of an information processing system use to communicate with each other, or the signals sent through those interfaces. Inputs are the signals received by the unit, and outputs are the signals sent from it. The term can also be used as part of an action; to "do I/O" is to perform an input or output operation. I/O devices are used by a person (or other system) to communicate with a computer. For instance, keyboards and mice are considered input devices of a computer and monitors and printers are considered output devices of a computer. Typical devices for communication between computers are for both input and output, such as modems and network cards.

Computer Software:
The term "software" was first used in this sense by John W. Tukey in 1957. In computer science and software engineering, computer software is all computer programs. The concept of reading different sequences of instructions into the memory of a device to control computations was invented by Charles Babbage as part of his difference engine. The theory that is the basis for most modern software was first proposed by Alan Turing in his 1935 essay Computable numbers with an application to the
Software is a program that enables a computer to perform a specific task, as opposed to the physical components of the system (hardware). This includes application software such as a word processor, which enables a user to perform a task, and system software such as an operating system, which enables other software to run properly, by interfacing with hardware and with other software.

Computer Hardware:
Computer hardware is the physical part of a computer, including the digital circuitry, as distinguished from the computer software that executes within the hardware. The hardware of a computer is infrequently changed, in comparison with software and data, which are "soft" in the sense that they are readily created, modified or erased on the computer. Firmware is a special type of software that rarely, if ever, needs to be changed and so is stored on hardware devices such as read-only memory (ROM) where it is not readily changed.
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