Notes on lesson on Basic Concept |

Basic Concept

This lesson covers following topics:
  • Introduction and history of computers
  • Simple model of computer and working parts of the computer
  • CPU, Memory and input/output devices
  • Computer languages and their hierarchy
  • Machine language, assembly language and high level language
  • Comparison of high level and low level languages especially C, C++, Pascal.


What is a computer?

A computer is an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program. This note describes what a computer is and its simple model.

Components of a basic computer

A basic computer consists of 4 components which are input device, output device , CPU and Memory. This note provides an information about components of basic computer.

How does a computer work?

Computer architecture is the conceptual design and fundamental operational structure of a computer system. By reading this note you can know about how does a computer work.

Features of a computer

The word computer is derived from Latin word 'computer', which means ' calculate'. Computers are used in wide verity of fields like home, school, colleges, offices, industries, banks, retail, stores, researches and development. This note explains about the various features of the computer.

Some Basic Terms Used In Computer Science

The physical parts of the computer which can be seen and touched is called hardware. This note explains some very basic terms used in computer science such as hardware, RAM, ROM, IC, Firmware, etc.

History of Computers

The history of computer can be traced to mechanical age i.e there were mechanical devices for the calculation purpose. This note explains about the evolution of computer through years.

Input Devices

An input device for a computer allows you to enter information. This note provides an information about input devices.

Output Devices

Output devices are the devices which enable our senses to persive the result of computer processing to see the result and display it. This note provides us an information about output devices.