basics of computer system

1. PRESENTED BY
MANOJ L

2. An electronic device, operating under
the control of instructions stored in its
own memory unit, 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.

3. Central Processing
Unit (CPU)
Control Unit
Input Data Primary Storage
Output Data
Unit
Arithmetic and
Logic Unit
Secondary
Registers Storage
Unit

4. Any hardware component that allows you to
enter data, programs, commands, and
user responses into a computer
Includes –
Keyboard
Mouse
Optical Scanner
Touch Screen, so on

5. The processor, also called the central
processing unit (CPU), has subdivided into two
major subunits -
• The control unit interprets the instructions
• The arithmetic/logic unit (ALU) performs
the logical and arithmetic processes

6. Converts the electronic information produced by the
processor into human-intelligible form for
presentation to end users.
Includes –
Video Display Unit
Printer
Audio Response Unit

7. Stores data and software instructions needed
for processing.
 Primary Storage Unit – RAM & ROM
 Secondary Storage Unit –
Floppy disk, or diskette
Compact Disc CD-R, CD-RW, CD-ROM
DVDs – DVD-ROM, DVD-R, DVD-RW, DVD-RAM
Flash disk/USB drive
Hard disk ( non removable)
Cache Memory for high speed – Storage circuitry stores
temporary instructions and data elements

8. 1. TYPES OF COMPUTER SYSTEMS
• Microcomputer systems
•Personal computers, PDA’s, workstations etc.
• Midrange systems
•Network or Web servers, Multi-user systems etc.
• Mainframe systems
•Enterprise systems, Super servers, Transaction
Processors etc.

9. 2. PERIPHERALS
•Monitors
•Printers
•Scanners
•Hard Disk Drives
•CD & DVD (Dissociated Vertical Deviation) Drives
•Backup Systems

10. 3. INPUT TECHNOLOGIES
•Pointing Devices
•Pen based Computing
•Speech Recognition System
•Optical scanning
•Magnetic stripe
•Smart Cards

11. 4. OUTPUT TECHNOLOGIES
•Video Output
•Printed Output
•Storage
•Magnetic Disks
•Floppy disks
•Hard disk drives
•Magnetic Tape
•Optical Disks

12. Is the general term for various kinds of programs
used to operate and manipulate computers and
their peripheral devices.

13. TYPES OF SOFTWARE
•Application Software: performs information processing tasks for end
users.
•General purpose application programs
•Application specific programs (custom software)
•System Software: manages and supports operations of computer
systems and networks.
•System management programs.
•System development programs.

14. Application Software
 Business application software
 Software suites
 Web browsers
 Electronic mail & Instant messaging
 Word processing
 DTP (Desktop Publishing)
 Electronic spreadsheets
 Presentation graphics
 Personal information managers
 Groupware

15. System software
System management programs: Programs that manage the hardware,
software, network and data resources of computer systems during the
execution of information processing jobs of the user.
E.g. Operating system, DBMS etc.
System development program: Programs that help users develop
information system programs and procedures and prepare user programs
for computer processing.
E.g. Programming language translators & editors,
CASE (computer aided software engineering)

16. Computer software
Performs Manages & supports
information operations of
processing tasks computer systems
for end users and networks
Application System
software software
General
purpose Application- System System
application specific development management
programs programs programs programs
Word processor, CRM, ERP, CASE packages, OS, DBMS,
Spreadsheet E- commerce Programming Application
Web browsers editors & tools servers

17. THE END
THANK YOU