Author: MJ

TOPIC 1 : INTRODUCTION TO NETWORKING AND DATA COMMUNICATION – Click to view TOPIC 2 : APPLICATION AREAS OF INFORMATION AND COMMUNICATION TECHNOLOGY – Click to view TOPIC 3 : IMPACT OF INFORMATION AND COMMUNICATION TECHNOLOGY (ICT) ON SOCIETY – Read More …

Introduction In the previous chapter, we studied how to develop a system using some system analysis and design methods without necessarily referring to any particular programming language. Therefore, we have been looking at what a system analyst ought to do Read More …

Introduction The concept of a system emerged from early psychologists who believed that the mind was a whole unit, rather than a collection of psychological parts as the belief was by that time. However, it was Ludwig von Bertalanff, a Read More …

Introduction Human beings have evolved from the Stone Age to a highly sophisticated and advanced society by inventing things like the wheel, fire, transistors and today’s ultra modem devices like computers. The idea of computers started way back in the Read More …

Introduction Data refers to the raw facts that do not have much meaning to the user and may include numbers, letters, symbols, sound or images. Information, on the other hand, refers to the meaningful output obtained after processing the data. Read More …

Introduction In Book 1 of this series, we learnt that computers are classified according to functionality, physical size and purpose. We saw that when classified according to functionality, computers can be analog, digital or hybrid. Digital computers process data that Read More …

TOPIC 1 : DATA REPRESENTATION IN A COMPUTER – Click to view TOPIC 2 : DATA PROCESSING – Click to view TOPIC 3 : ELEMENTARY PROGRAMMING PRINCIPLES – Click to view TOPIC 4 : SYSTEM DEVELOPMENT – Click to view Read More …

6.1 Introduction and definition Computer information systems are becoming more and more important in daily life. Governments, private enterprises and individuals have found the need to protect data and information that is in their custody against unauthorized access, disclosure or Read More …

Introduction Computers can be connected together using data transmission media like cables, to communicate with one another. Communication in this case will be in the form of exchange of data and information. Such interconnection of computers to achieve message transfer Read More …

Introduction Have you ever asked yourself how newspaper and book publishing companies manage to produce publications that are attractive with creative layouts and graphics in large volumes? They do this through a special process called publishing. Publishing is the process Read More …