bzupages.com. bzupages.com ict(information technology) presented to: sir imdad ullah presented by:...

BZUPAGES.COMBZUPAGES.COM

BZUPAGES.COMBZUPAGES.COM

ICT(Information Technology)Presented to:

Sir IMDAD ULLAHPresented by:

Zeeshan HaiderRashda NawazZainib AliSana KiranAwais AkramMaria javed

Department of IT Institute of computing

Bzu Multan

BZUPAGES.COMBZUPAGES.COM

TOPIC:

BZUPAGES.COMBZUPAGES.COM

A Computer ....

takes input processes it according to stored

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

BZUPAGES.COMBZUPAGES.COM

Components of Computer Systems Keyboard Display System Unit Storage Printer

BZUPAGES.COMBZUPAGES.COM

BZUPAGES.COMBZUPAGES.COM

Input Systems

INPUT Keyboard » Most common input device » QWERTY

BZUPAGES.COMBZUPAGES.COM

Input Systems INPUT Mouse » Cursor manipulation Device » Trackball

Trackball

Mouse

BZUPAGES.COMBZUPAGES.COM

Input System

Touch Screens(common device)

BZUPAGES.COMBZUPAGES.COM

Input Systems INPUT Bar Code Readers

Barcodes

Barcode Reader

BZUPAGES.COMBZUPAGES.COM

Input Systems Camera Systems(common device) Video conferencing

BZUPAGES.COMBZUPAGES.COM

Output Systems

» LCD (Liquid Crystal Display)

» CRT (Cathode RayTube)

» Music

Music System

LCD

BZUPAGES.COMBZUPAGES.COM

Output Systems

• Modems

– Modulator-Demodulator

– Allows computers to

communicate over telephone lines

BZUPAGES.COMBZUPAGES.COM

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.

BZUPAGES.COMBZUPAGES.COM

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

BZUPAGES.COMBZUPAGES.COM

Storage Systems

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

BZUPAGES.COMBZUPAGES.COM

Storage Systems

Magnetic Disk A circular platter coated with magnetic

material Floppy Disk Hard Disk

Floppy

Hardisk

BZUPAGES.COMBZUPAGES.COM

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.

BZUPAGES.COMBZUPAGES.COM

Components of System unit Mother Board CPU ALU CU

BZUPAGES.COMBZUPAGES.COM

Mother Board

It is most important circuit board in system unit

It contains different chips

BZUPAGES.COMBZUPAGES.COM

CPU

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

BZUPAGES.COMBZUPAGES.COM

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

BZUPAGES.COMBZUPAGES.COM

Thanks…!