Introduction To Computer Systems

 

Understanding System

The system is derived from the Latin (systema) and the Greek (sustema) is a unity composed of components or eleven connected together to facilitate the flow of information, matter or energy. The system is also a unity of interconnected parts that are in a region and has driving items.

Understanding Computers

Computer is a tool used to process data according to procedures that have been formulated. The original computer word was used to describe a man whose work performed arithmetic calculations, with or without aids, but the meaning of the word was then transferred to the machine itself.

Understanding Computer Systems

Computer Systems are the elements involved to run an activity using a computer. Elements of a computer system consist of human beings (brainware), device software (software), instruction set (instruction set), and hardware hardware).Thus the component is an element involved in a computer system. Of course hardware does not mean anything if there is not one of the other two (software and brainware). Simple example, who will turn on the computer if there is no human. Or will run what command the computer if there is no softwarenya. The Von Neumann architecture describes a computer with four main parts: Arithmetic and Logical Unit (ALU), control unit, memory, and input and output tools (collectively called I / O). This section is connected by a wire file, "bus".

Computer Components

Components - components in the computer system is divided into 3, which can not be separated, namely:1. Hardware (Hardware)
       a. Processing Device
       b. Input Device
       c. Output Device
       d. Storage Device

The mechanical devices that makeup the computer are called HARDWARE, for example, Keyboard, hard disk, monitor, processor and mother board etc. Hardware are physical devices. They can be touched. Hardware device are interconnected and perform input, processing and output operations.
 

 2. Software (Software)
       a. Operating System
       b. Application Program
       c. Language Program

Software is the set of instructions given to computer to perform a task. Software tells the computer what to do. System Software like operating systems are used to manage components and operations of computer. Application Software like MS Word and MS Excel are used to solve specific problems of the user, for example creating documents or preparing Student Result Sheet etc. Thousands of different software are available for use on PC.3. Brainware (People Who OperateComputer)Based on the system understanding, a system is a set of inter related components that work together to fulfill a purpose. For example a Road Transportation System will consist of the parts - roads, vehicles- trucks, buses, vans, cars etc, passengers, the staff for ticketing and maintenance of vehicles and roads etc. And the transportation system will fulfill the purpose of carrying of passengers and luggage from place to place. Similarly, a computer system consists of many components that work together to fulfill the purpose of data processing. A Computer system consists of the following four parts:

3. Brainware
Brainware is the person who operates a computer, because if no one is operating it will not be usable.
People that operate the computer are called computer operators or computer users. Users use computer to solve different problems. For example, in a college a computer operator in Examination Section will feed marks obtained by students in a software like MS Excel. He/ She will perform certain functions and formulae to calculate percentage and grade of each student and prepare a result sheet. This result sheet will show the marks obtained, percentage, grade and Fail/ Pass status of every student.