BZUPAGES.COM. BZUPAGES.COM ICT(Information Technology) Presented to: Sir IMDAD ULLAH Presented by: Zeeshan Haider Rashda Nawaz Zainib Ali Sana Kiran Awais.

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ICT(Information Technology)Presented to:

Sir IMDAD ULLAHPresented by:

Zeeshan HaiderRashda NawazZainib AliSana KiranAwais AkramMaria javed

Department of IT Institute of computing

Bzu Multan


TOPIC:


A Computer ....

takes input processes it according to stored

instructions produces results as output If necessary store the data for future use


Components of Computer Systems Keyboard Display System Unit Storage Printer



Input Systems

INPUT Keyboard » Most common input device » QWERTY


Input Systems INPUT Mouse » Cursor manipulation Device » Trackball

Trackball

Mouse


Input System

Touch Screens(common device)


Input Systems INPUT Bar Code Readers

Barcodes

Barcode Reader


Input Systems Camera Systems(common device) Video conferencing


Output Systems

» LCD (Liquid Crystal Display)

» CRT (Cathode RayTube)

» Music

Music System

LCD


Output Systems

• Modems

– Modulator-Demodulator

– Allows computers to

communicate over telephone lines


Output Systems

Hard Copy Printer

A printer is an output device that’s prints charters symbols & graphics on papers the printer o/p is called hard copy.


Storage Systems

RAM - Random Access Memory

Read/Write Memory

Volatile ROM - Read Only Memory

Non-volatile

Won’t disappear when power is off

RAM

ROM


Storage Systems

Optical Disks Digital code read by laser 650 Mbytes in a 4.75” plastic platter CD ROM; Erasable Disks


Storage Systems

Magnetic Disk A circular platter coated with magnetic

material Floppy Disk Hard Disk

Floppy

Hardisk


System Unit

System unit is a box that ‘s contains different components of computer system.

Most storage devices memory processor card ,posts& connectors reside inside the system unit.


Components of System unit Mother Board CPU ALU CU


Mother Board

It is most important circuit board in system unit

It contains different chips


CPU

Two parts of CPU ALU (Arethimetic Logic Unit) CU (control unit)


ALU

Arithmetic Unit

Arithmetic Unit of ALU performs basic arithmetic function such as subtraction, multiplication, addition, division

Control Unit

it acts like a supervisor of the computer .It does not execute instruction by itself .It controls and coordinates all activities of computer system


Thanks…!

BZUPAGES.COM. BZUPAGES.COM ICT(Information Technology) Presented to: Sir IMDAD ULLAH Presented by: Zeeshan Haider Rashda Nawaz Zainib Ali Sana Kiran Awais.

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