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Wednesday, July 24, 2013

PPT On Computer Systems

Presentation On Computer Systems

Computer Systems Presentation Transcript:
1.The Computer System

2.Computer is an electronic device that accepts data as input, processes the input data by performing mathematical and logical operations on it, and gives the desired output.
The computer system consists of four parts—(1) Hardware, (2) Software, (3) Data, and (4) Users. The parts of computer system are shown

3.Parts of computer system

4.Hardware consists of the mechanical parts that make up the computer as a machine. The hardware consists of physical devices of the computer.

The devices are required for input, output, storage and processing of the data. Keyboard, monitor, hard disk drive, floppy disk drive, printer, processor and motherboard are some of the hardware devices.

5.Software is a set of instructions that tells the computer about the tasks to be performed and how these tasks are to be performed. Programs a set of instructions, written in a language understood by the computer, to perform a specific task.
A set of programs and documents are collectively called software. The hardware of the computer system cannot perform any task on its own.

6.The hardware needs to be instructed about the task to be performed. Software instructs the computer about the task to be performed. The hardware carries out these tasks. Different software can be loaded on the same hardware to perform different kinds of tasks.

Data are isolated values or raw facts, which by themselves have no much significance. For example, the data like 29, January, and 1994 just represent values.

7.The data is provided as input to the computer, which is processed to generate some meaningful information. For example, 29, January and 1994 are processed by the computer to give the date of birth of a person.

Users are people who write computer programs or interact with the computer. They are also known as skinware, liveware, human ware or people ware. Programmers, data entry operators, system analyst and computer hardware engineers fall into this category.

8.A computer is an electronic device that (1) accepts data, (2) processes data, (3) generates output, and (4) stores data. The concept of generating output information from the input data is also referred to as input-process-output concept.

9.The input-process-output concept of the computer is explained as follows—
Input The computer accepts input data from the user via an input device like keyboard. The input data can be characters, word, text, sound, images, document, etc.
Process The computer processes the input data. For this, it performs some actions on the data by using the instructions or program given by the user of the data. The action could be an arithmetic or logic calculation, editing, modifying a document, etc

10.Output The output is the During processing, the data, instructions and the output are stored temporarily in the computer’s main memory.
 result generated after the processing of data. The output may be in the form of text, sound, image, document, etc. The computer may display the output on a monitor, send output to the printer for printing, play the output, etc.
Storage The input data, instructions and output are stored permanently in the secondary storage devices like disk or tape. The stored data can be retrieved later, whenever needed.

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