EBAOMS COMPUTER EDUCATION

  A computer is an electronic machine that can input, process, store, and output a vast amount of information at an extremely high speed.  (a) Types Of Computer  There are three types of computer  1. Micro or Personal computer(PCs)  2. Mainframe  3. Supercomputers  (i) Personal Computers  The personal computer or PC, is designed to be used by one person at a time. There are different kinds of personal computers such as desktops, laptops, handheld computers, and Tablets PCs.  (ii) Desktop Computers  Desktop computer are designed for use at a desk or table. They are typically larger and more powerful than other types of personal computers. Desktop computers are made up of separate components. The main component, called the system unit, is usually a rectangular case that sits on or underneath a desk. Other components, such as the monitor, mouse, and keyboard, connect to the system unit. (iii) Laptop and Netbooks Laptops are lightweight mobile PCs with a thin screen. Laptops can operate on

    A computer accepts electronic signals from the input devices, analyzes and processes them, and then outputs the results to the output devices. Let’s assume a user is working in a word processor, which is software used to create and format text documents. When the user types “a,” the keyboard sends the electronic signal “01000001” to the CPU. Then the CPU processes the data and stores it in RAM. Finally the CPU instructs the monitor to display the letter “a” on screen.   UNDERSTANDING SOFTWARE Software provides electronic instructions that tell the hardware what to do. Software and hardware work together to perform the tasks requested by the user. There are two major types of software, namely operating systems and applications.   (i) Operating Systems Operating systems, such as Windows, MacOS, and Linux tell the computer how to interpret commands, manage files, and process input and output. An operating system, or OS, must be present before any other software, such as a word process

   Data  is electronic information. A computer file  is a collection of data stored as an individual entity. Computers contain many different types of files, which we’ll discuss as we go through this workshop. Some files are called documents. Files are stored in folders, or directories, which, like drawers in a filing cabinet, keep related files together. There are two basic parts of a computer: hardware and software. 1.     Hardware  refers to all the physical components of a computer, including the monitor, system unit, keyboard, mouse, microphone, speakers, and printer. 2.      Software  refers to the electronic files that enable users to accomplish tasks with the computer. A software program is sometimes referred to as an application. a) UNDERSTANDING HARDWARE A computer is composed of three types of hardware. The following table summarizes and gives examples of these types of hardware Type of Hardware Function Examples Input device Allows user to enter data and commands Keyboard,

  (a) Starting Computer In order to start most desktop PCs, two power switches must be turned on. One switch is for the monitor and the other is for the system unit. Notebook or laptop computers usually have only one power switch for the monitor and the system unit. (b) Turning a Monitor and System Unit As a rule, it’s a good idea to turn on the monitor and then the system unit to prevent an unnecessary power surge. Keep in mind that the monitor may be off to conserve power, even though the system unit is on. If the monitor is displaying an image, both the system unit and monitor are already on. Let’s see how to turn on the monitor. 1.To turn on the monitor, press: the monitor power button The monitor is on. Next, let’s turn on the system unit. 2.To turn on the system unit, press: the system unit power button The computer will begin to boot up, or load the operating system and the basic software and check to see what devices are connected to the computer. This process generally takes a