home

‍‍‍‍‍‍ **//Overview of computer ‍‍‍ ‍‍‍ //** = = //**The Parts of a Computer System**// • **What is a Computer?** • **Hardware** • **Software** • **Data** • **Users** //**What is a Computer? **// // **The Parts of a Computer System - Hardware** // • **A computer's hardware consists of electronic devices; the parts you can see and touch**• **The term "device" refers to any piece of hardware used by the computer, such as a keyboard, monitor, modem, mouse, etc.**
 * A computer is an electronic device used to process data ****. ****<span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">A computer can convert data into information that is ****<span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">useful to people. A complete computer system includes four distinct parts: Hardware, Software, Data, User. **

//<span style="color: #ff0000; font-family: Georgia,serif; font-size: 19px;">**The Parts of a Computer System - Software** //
 * <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">Software – also called programs – consists of organized sets of instructions for controlling the computer **<span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **Some programs exist for the computer's use, to help it manage its own tasks and devices.** **Other programs exist for the user, and enable the computer to perform tasks for you, such as creating documents.**

//**<span style="color: red; font-family: 'Arial','sans-serif'; font-size: 19px;">The Parts of a Computer System - Data **// <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **Data consists of raw facts, which the computer can manipulate and process into information that is useful to people. Computerized data is digital, meaning that it has been reduced to digits, or numbers. The computer**
 * <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">stores and reads all data as numbers. **<span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">**Although computers use data in digital form, they convert data into forms that people can understand, such as text, numerals, sounds, and images.**

//**<span style="color: red; font-family: 'Arial','sans-serif'; font-size: 19px;">Looking Inside the Machine **// <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **Types of Hardware** <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **The CPU** <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **Memory** <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **How Memory is Measured** <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **Input and Output Devices** <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **Storage Devices**

//**<span style="color: red; font-family: 'Arial','sans-serif'; font-size: 19px;">Looking Inside the Machine – **////**<span style="color: red; font-family: 'Arial','sans-serif'; font-size: 19px;">Types of Hardware **// <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **Processor** <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **Memory** <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **Input and output (I/O) devices** <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **Storage devices** //**<span style="color: red; font-family: 'Arial','sans-serif'; font-size: 19px;">Looking Inside the Machine –Input and Output Devices **//
 * <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">A computer's hardware devices are categorized as **
 * <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">follows: **

<span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **Input devices accept data and instructions from the user or from another computer system. The keyboard and mouse are examples of input devices.** <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **Output devices return processed data back to the user or to another computer system. The printer and monitor are examples.** <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **Communications devices (such as modems and network interface cards) perform both input and output, allowing computers to share information.**

media type="custom" key="11973885" align="center"

<span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **Storage devices hold data not currently being used by the CPU. Data is commonly stored on a magnetic or optical disk. Each type uses a special medium for storing data on its surface.** • **A disk drive is a device that reads data from and writes data to a disk. Most new computers feature a** <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">• **The most common optical storage devices are CDROM**
 * <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">floppy disk drive, a hard disk drive, and an optical disk drive. **
 * <span style="color: #3333cd; font-family: 'Times New Roman','serif'; font-size: 19px;">and DVD-ROM drives. **

media type="youtube" key="Lw9vrs1xwrg" height="315" width="420" align="center"