Computer Fundamentals Keyboarding Unit 2
What Is A Computer? An electronic device that receives data, processes data, stores data, and produces a result (output) Classified by size, speed and application Uses hardware and software Comes in different types Keyboarding Unit 2
Hardware The tangible, physical equipment of the computer that can be seen and touched such as: Computer Case-houses inside components Monitor-CRT or LCD Keyboard-contains numbers and letters like a typewriter Mouse-right click for special functions Disk Drives-floppy, hard, CD, DVD, Flash Speakers Keyboarding Unit 2
PARTS OF A COMPUTER SYSTEM Computer Case (Processor inside) Monitor Speaker Keyboard Computer Case (Processor inside) Mouse CD-ROM/DVD Drive Printer Floppy Disk Drive Keyboarding Unit 2
Input Devices Keyboard Mouse Joystick Touchpad Touch Screen Bar Code Reader Scanner Microphone Digital Cameras Keyboarding Unit 2
Output Devices Monitor: screen that displays information such as text, numbers, and pictures. Softcopy Printer: gives you information from the computer in printed form. Hardcopy Speakers: allow you to hear voice, music, and other sounds from your computer. Keyboarding Unit 2
Processing Device Central Processing Unit (CPU)--known as the heart or “brain” of the computer and is responsible for processing the information that has been entered into the computer Keyboarding Unit 2
Which Storage Device Holds The Most Information? Flash, Jump, Thumb Drive 1 GB and up CD-ROM DISC 640 MB HARD DRIVES 80 GB and above Terabyte = 1000 GB DVD DISC 17 GB Keyboarding Unit 2
What Are Peripherals? A peripheral device is one that is attached to a computer in order to expand its ability to perform more tasks Are generally external Some of the more common devices are printers, disk drives, scanners, microphones, speakers, and cameras The devices can be input and output devices Some input devices are: mouse, joystick, keyboard, scanner Some output devices are: monitor, projector, speakers Keyboarding Unit 2
Software The intangible set of instructions that tells the computer what to do; known as programs or software programs. Keyboarding Unit 2
Types of Software Operating System Software Application Software Sets the rules for how computer hardware and application software work together, controls the operation of the computer. Example: Windows XP, VISTA, Windows 7 Application Software Lets you accomplish specific tasks based on your needs. Examples: MS Word, Excel, PowerPoint, MS Works Keyboarding Unit 2
Operating System Software Tasks Boots (starts up) the computer Formats disks Creates folders Saves and retrieves files Moves and copies files Every Computer Has Operating System Software! Keyboarding Unit 2
Application Software Software that works with the operating system to meet a specific need or perform a specific task Examples: MS Word—for word processing documents MS Excel—for math calculation spreadsheets MS PowerPoint—for slide presentations MicroType—for learning to type correctly Internet Explorer—for accessing the Internet Keyboarding Unit 2
Virus/Anti-Virus Software Programs that are written to damage/destroy computers are called viruses. Anti-Virus software has to then be written to prevent (kill) the damage that virus software can do. Keyboarding Unit 2
WHAT DOES IPOS STAND FOR? Input Enters data into the computer- Receives Data Processing Changes data into usable form Output Sends data out of the computer Storage Saves for use later Keyboarding Unit 2
How The IPOS Cycle Works INPUT PROCESSING OUTPUT STORAGE Keyboarding Unit 2