computer presentation
TRANSCRIPT
SUBMITED BYMAYANK YADAV
Introduction to Computers
What is a computer?
An electronic device, operating under the control of instructions stored in its own 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.
Devices that comprise a personal computer.
Inside a computer
Information Processing Cycle—four general operations Input Processing Output Storage
What are the components of the computer? Input devices Central processing unit (CPU) Output devices Memory Storage devices
Input Devices
Keyboard Mouse Digital camera Scanner Microphone
Keyboards
Mouse Devices
Digital Cameras
Scanners
Microphones
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
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
Output Devices Printers
Impact printers Dot matrix printers
Nonimpact printers Ink jet Laser
Color B & W
Monitors CRT’S LCD’S
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 – 250G+ 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 – 4 GB
STORAGE DEVICES
Software—Can be categorized into four types System software Application software Educational software Entertainment 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
Application Software
Programs that tell a computer how to produce information
Commonly used applications Word processing Spreadsheet Database Presentation Financial Email Taxing
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 Sports games
Madden NFL MLB
The Sims World of Warcraft Rollercoaster Tycoon Final Fantasy Halo Myst Half Life Barbie Fashion Show
THANK YOU