Introduction to Computers

Introduction to Computers by Wolfnet IT Services your 1 Stop computer repair service in Torquay 01803 423523 http://wolfnet-it.net : 

Introduction to Computers by Wolfnet IT Services your 1 Stop computer repair service in Torquay 01803 423523 http://wolfnet-it.net

Inside a computer: 

Inside a computer

What is a computer?: 

What is a computer? An electronic device, operating under the control of instructions stored in its own ROM memory unit, that can accept data, manipulate the data according to specified rules, produce information from the processing, and store the results for future use.

Information Processing Cycle: The 4 general operations: 

Information Processing Cycle: The 4 general operations Input Processing Output Storage

Devices that comprise a PC: 

Devices that comprise a PC Speaker Display Monitor Printer Scanner Headset Keyboard Mouse Internet Router Digital Camera System Unit Speaker

What are the components of the computer?: 

What are the components of the computer? Input devices Central processing unit (CPU) Output devices Memory Storage devices

Input Devices: 

Input Devices Keyboard Mouse Digital camera Scanner Microphone

Keyboards: 

Keyboards

Mouse Devices: 

Mouse Devices

Digital Cameras: 

Digital Cameras

Scanners: 

Scanners

Headsets and Microphones: 

Headsets and Microphones

Central Processing Unit: 

Central Processing Unit Made up of the control unit and arithmetic/logic unit The brains of the CPU is the processor. There are different brands and speeds Pentium made by Intel Celeron made by Intel Athlon made by AMD Memory RAM—also called Random Access Memory

Processors & Memory: 

Processors & Memory

Output Devices: 

Output Devices Printers Impact printers Dot matrix printers Daisy Wheel Nonimpact printers Ink jet Laser Color B & W Monitors CRT’S LCD’S

Data Representation: 

Data Representation Byte—one character of data Kilobyte—one thousand bytes of data Megabyte—one million bytes Gigabyte—one billion bytes Terabyte—one trillion bytes Petabyte—one quadrillion bytes Exabyte—one quintillion bytes Zettabyte—one sextillion bytes Yottabyte—one septillion bytes

STORAGE DEVICES: 

STORAGE DEVICES Floppy Disks 3.5-inch disks store 1.44M of data Must be formatted Tracks sectors Hard Disks Spins at 5,400 – 7,200 rpm (revolutions per minute) Can store anywhere between 10G – 3T+ of data CD’s—Compact Discs Available in a variety of formats—CD-ROM, CD-R, CD-RW A typical CD holds about 650 MB of data DVD’s Available as DVD-ROM, DVD-R, DVD-RW Can hold 4.7 GB of data Zip Drives—high capacity floppy disk drive; has lost popularity Zip disks can hold from 100 MB – 250 MB of data USB Flash Drive Storage capacity between 32 MB – 64 GB

Software can be categorized into 4 types: 

Software can be categorized into 4 types System software Application software Educational software Entertainment software

STORAGE DEVICES: 

STORAGE DEVICES

System Software: 

System Software Controls the operations of computer equipment Operating System software tells the computer how to: Load Store Execute OS is loaded into memory when the computer is turned on This process is called booting Most OS’s use a Graphical User Interface (GUI) Provides visual cues such as icons Each icon represents an application

Educational Software: 

Educational Software Software that can be used for learning purposes Examples include: Jump Start Series Mavis Beacon Teaches Typing Reader Rabbit Encarta or World Book Math Blaster Rosetta Stone Spanish

Entertainment Software: 

Entertainment Software Sports games FIFA Pro Golf The Sims World of Warcraft Rollercoaster Tycoon Final Fantasy Halo Myst Half Life Barbie Fashion Show

Application Software: 

Application Software Programs that tell a computer how to produce information Commonly used applications Word processing Spreadsheet Database Presentation Financial Email Multimedia

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