COMPUTER STUDIES/INFORMATION AND COMMUNICATION TECHNOLOGY

PROGRAM DEVELOPMENT Definition of a Program A computer program can be defined as an organized list of instruction (issued to the computer to perform a particular task) that cause it behave in a predetermined manner when executed. Programs are written in computer

INPUT AND OUTPUT DEVICES INPUT DEVICE Input device are devices that are used to input text and graphics into the computer for processing.

APPLICATIONS OF ICT Introduction: ICT can be seen to cover almost every sphere of human life and endeavour either to enhance productivity or make work easier, faster and more convenient for the user. 

SOME COMPUTER TERMINOLOGIES INTRODUCTION:  Computer Terminology are the common terms used in the field of computing. These are the terms you will easily hear in conversations concerning computers in general. Listed below are a few of the terms: Bit  The smallest piece of information used by the computer. In computer language, it is either a one (1) or a zero (0). Backup A copy of a file or disk you make for archiving purposes. Boot To start up a computer. Bug A programming error that causes a program to behave in an unexpected way. Byte A piece of computer information made up of eight bits. Card or Expansion Card A printed circuit board that adds some feature to a computer. CD-ROM An acronym for Compact Disc Read-Only Memory. Control panel A program that allows you to change settings in a program or change the way a computer looks and/or behaves. CPU Central Processing Unit. The processing chip that is the “brain” of a computer. Crash A system

GRAPHICS PACKAGES I Definition of Graphics Packages A graphics package is an application that can be used to create and manipulate images on a computer.

TELECOMMUNICATION This is the exchange of information over significant distances using electronic medium such as telephone, cable, telegraph etc. Telecommunication system is any system that is used for communication over distances. It is an Interaction over a distance by cable, telephone, or other means. Types of Telecommunication:                 a. Public Switched Telephone Network (PSTN) (Land Line) : PSTN is the network which allows any telephone in the world to Communicate.                 b. Mobile Phone System (GSM): This is a digital telecommunication system; example of a Mobile Phone device is the (GSM) Global System for Mobile Communication. The GSM can be used for voice communication, text messaging, and data transfer.                 CSPT – Circuit Switched Packet Telephone System                 c. Satellite Telephone System: This is the type of mobile phone that connects to orbiting satellite while other mobile phone that gets their signals from a physical tel

  SS1 - SS3 ICT LESSON NOTES

COMMUNICATION SYSTEMS I Introduction:   ICT is an acronym that stands for Information and Communication Technology. Information is refers to knowledge obtained from reading, investigating, study and research. Communication is an act of transmitting message.

Introduction :  Systems development is a planned undertaking with a fixed beginning and end that produces the desired result or product. It may be a large job that involves many people working

  FLOWCHART A flowchart is a pictorial representation of an algorithm in which the steps are drawn in the form of different shapes of boxes and the logical flow is indicated by interconnecting arrows. The boxes represent operations and the arrows represent the sequence in which the operations are implemented. A flowchart is a diagrammatical representation of an algorithm. Flowchart symbols, Name and Functions   Commonly Used Flowchart Symbols          Process          Terminator          Decision          Predefined Process          Flow line The graphics above represent different part of a flowchart. The process in a flowchart can be expressed through boxes and arrows with different sizes and colors. In a flowchart, we can easily highlight a certain element and the relationships between each part.  Example 1: Calculate the Interest of a Bank Deposit         Example 2: Algorithm to Determine and Output Whether Number N is Even or Odd        

ALGORITHM  Algorithm can also be defined as a procedure consisting of a series of steps which specify a sequence of operations that provides the solution to a problem.

Topic: TECHNOLOGY OF DIFFERENT INFORMATION AGES Technology can be defined as the technical means that people use to improve their lives and environment. As human being develops, the technology he uses develops. Information is processed data. Technology of information age is the evolution of different objects for tool making.

MIDDLE AGE (FEATHER PEN AND INK) The middle age was the era of writing with feather pen made from bird feather and was used for all their writings. The feather pen was invented in ancient times. The process of writing was done by dipping the feather pen into an inkpot. Besides the feather pen, there were other inventions like paper was developed. The Egyptians used this for writing scrolls in the middle age.