3.
An electronic device, operating under the control of
instructions stored in its own memory units, that can
accept data (INPUT), manipulate the data according to
specified rules (process), produce information (output),
from the processing, and store the results for future use
Presented by Shaheer 3
What is a computer?
4. What dose a computer do?
• Input
• Process
• Output
• storage
Presented by Shaheer
4
5. INPUT DEVICES
• Any hardware component that allows you to enter
data, programs, commands, and user responses
into a computer
• Input devices
Examples
• Keyboard
• Mouse
P R E S E N T E D B Y S H A H E E R 5
6. • Output devices make the information resulting
from processing available fore use
• Output Devices Examples
• Printers
• Display Devices
Presented by Shaheer 6
7. Storage Devices
Removable
Floppy disk or
diskette
Compact disc CD-
R, CD-RW, CD-ROM
Tape
Flash drive
Zip disk
Non-removable
Hard disk
Presented by Shaheer
7
8. SYSTEM UNIT
P R E S E N T E D B Y S H A H E E R 8
• The motherboard or system board is the main circuit board of system unit.
• The processer also called the central processing unit (CPU) interprets and
carries out the basic instructions that operate a computer.
• The control unit interprets the instructions.
• The arithmetic /logic unit (ALU) perform the logic and arithmetic processes.
• Memory also called random access memory or RAM.
9. Types of Computers
• Super computers
• Mainframes
• Micro computers
• Desktops
• Laptops
• handhelds
PresentedbyShaheer
9
10. Operating Management
Load, store and execute programs
Transfer data
File Management
Files
Folder
System Maintenance
Virus check
Check disk
System Monitoring
10Presented by Shaheer
11. Presented by Shaheer 11
*A communications devices is a hardware
components that enables a computer to send
and receive data, instructions, and information
to and from one or more computers
*Communications occur over transmission
media, such as telephone lines, cables, cellular
radio networks, and satellites
12. COMPUTER SOFTWARE
• System software consist of programs to control the
operations of computer equipment
• Instruction in the operating system tell the
computer how to perform the functions of loading,
storing, and executing an application program and
how to transfer data.
• When a computer is turn on, the operating system is
loaded into the computers memory from auxiliary
storage
• Most computer us an operating system that has a
graphical user interface (GUI)
Presented by Shaheer
12
13. Word processing
Spreadsheet
Presentation graphic
Database
Contact management
Utility software – antivirus, data backup and
file compression
Presented by Shaheer 13
