RESEARCH BACK UP

Introduction One of the biggest fears of having computers are viruses, viruses are malicious programs designed entirely for destruction and havoc. Viruses are created by people who either know a lot about programming or know a lot about computers.  Computer Virus Computer virus is one of the greatest threats to computers and computer applications. Once the virus is made it will generally be distributed through shareware, pirated software, e-mail or other various ways of transporting data, once the virus infects someone's computer it will either start infecting other data, destroying data, overwriting data, or corrupting software. The reason that these programs are called viruses is because it is spreads like a human virus, once you have become infected either by downloading something off of the Internet or sharing software any disks or write able media that you placed into the computer will then be infected. When that disk is put into another computer their computer is then infect...

Introduction In the early days of computing, computers were originally meant to assist in scientific and engineering applications. Today, computers are widely used to perform wide ranging tasks from routine accounting operations to management decision making. Corporate operations are becoming more complex and competitive thus increasing the need to produce and process more accurate and timely data both in quantity and quality. More accurate, reliable and timely data are needed for corporate planning, policy formulation and decision making Business and Industry . The following areas of application of computer technology in business will be discussed in details: Payroll.  Inventory Control.  Auditing Operations.  Personnel Record Keeping.  Preparation of Customer Utility Bills and Payment Orders.  Management Information System.  High Quality Production Controls.  Point of Sale Service.  Financial Market Transactions.  Publishing Industry....

Science and Engineering Computer is commonly used to find the accurate solutions to both scientific and engineering problems. Weather forecasting has now become a daily activity to which the computer has proved very useful in providing information on the kind of weather we are likely to expect over a period of time. Such accurate predictions help the farmers, airline operators, navigators and other activities which depend on the weather for their operations. Computer aided critical path study is used to monitor the optimum and efficient use to time, money, material and human resource in the execution and implementation of projects. Such critical path study is used successfully on various projects, for example, the construction of roads, bridges, buildings, manufacturing, the conduct of election and sales campaigns. Another scientific application of the computer is the monitoring, simulation modeling techniques to provide indicators as to how systems such as the human body, economy, we...

Introduction  In this module we shall discuss the application of computers in the following areas:  • Education  • Science and Engineering  • Health Care  • Business and Industry  • Transport and Communications  • Recreation  • Government  • The Military etc.  Computer has become a universal tool of any modern man (or woman). Literacy, today is not defined only in terms of the ability to read and/or write but in addition, it includes the ability to use and communicate with the aid of computer. In the education sector, computers are being used to promote teaching and learning.  Objective The main objective of this unit is to identify some areas of application of computer in the in the field of education. Application of Computers in Education The field of education provides the most fascinating application of computing system. This has consequently attracted considerable attention from educationist and policy makers since the late ...

Introduction Visual is an event driven language which has some features of Object Oriented Programming (OOP). Actions are tied to the occurrence of events e.g. an action may be triggered by clicking the mouse. This approach make application programs more friendly and natural to the end user. In this unit students are introduced to the concept of working with graphical objects and the general Visual Basic Programming concepts. Learning To Run Visual Basic Applications These sessions will include learning how to work with graphical objects in the Visual Basic Environment and using general Visual Basic Programming concepts. How To Design A Project From The Application Wizard. A project is a collection of files that make up your application. A single application might consist of several files, and the project is the collection of those files. The application wizard can be selected from the New Project dialog box. If you cancel the New Project dialog box, and then later want to start the A...

HARDWARE COMPONENTS Introduction Your Personal Computer (PC) is really a collection of separate items working together as a team-with you as the captain. Some of these components are essential; others simply make working more pleasant or efficient. Adding extra items expands the variety of tasks you can accomplish with your machine. The System Unit The system unit is the main unit of a PC. It is the Computer itself while other units attached to it are regarded as peripherals. It could be viewed as the master conductor orchestrating your PC’s operation. It is made up of several components like the Motherboard, Processor, Buses, memory, power supply unit, etc. This unit (system unit) has been confused over the years by novices as the CPU. This is not true. The CPU (Central Processing Unit) or simply processor is a component within the system unit and it is not the only thing that makes up the system unit. Hence, it will be wrong to equate the system unit with the CPU. Front of t...

Introduction Computer programming is both an art and a science. In this unit, we students shall be exposed to some arts and science of computer programming including principles of programming and stages of programming. Problem Solving With The Computer The computer is a general-purpose machine with a remarkable ability to process information. It has many capabilities, and its specific function at any particular time is determined by the user. This depends on the program loaded into the computer memory being utilized by the user. There are many types of computer programs. However, the programs designed to convert the general-purposes computer into a tool for a specific task or applications are called ‘Application programs’. These are developed by users to solve their peculiar data processing problems. Computer programming is the act of writing a program which a computer can execute to produce the desired result. A program is a series of instructions assembled to enable the computer...

 Introduction The computer peripheral devices are those devices which are attached to the system unit. The devices are necessary to ensure that the computer is able to accept input and display the result for the user. This section therefore discusses the input unit and the output unit.  Computer Keyboard A Computer keyboard is identical to the conventional typewriter keyboard. However, it has more keys than the typewriter keyboard. A computer keyboard can be a dummy type or intelligent type. A computer keyboard is considered too be intelligent if, in addition to performing the routine functions characteristic of a typewriter keyboard, it can initiate a series of actions for a computer to carry out by mere pressing a key or combination of two or more keys. An intelligent computer keyboard has a set of keys and when one of them is pressed, the computer can be made to carry out a specific function. For example, the pressing of a key may cause the computer to display a menu l...

Introduction The computer has passed through many stages of evolution from the days of the mainframe computers to the era of microcomputers. Computers have been classified based on different criteria. In this unit, we shall classify computers based on three popular methods. Categories of Computers Although there are no industry standards, computers are generally classified in the following ways:  Classification Based On Signal Type There are basically three types of electronic computers. These are the Digital, Analog and Hybrid computers. Digital Computer Represent its variable in the form of digits. It counts the data it deals with, whether representing numbers, letters or other symbols, are converted into binary form on input to the computer. The data undergoes a processing after which the binary digits are converted back to alpha numeric form for output for human use. Because of the fact that business applications like inventory control, invoicing and payroll deal with discr...