Summery : Theory Midterm & Finale

Fazlea Allahie

Objective Introducing Computer Systems Looking Inside the Computer System Interacting with your computer Inputting Data in Other ways Video & sound The Internet & the world wide web email & other Internet Services

Printing Processing Data Types of Storage Devices Measuring & Improving drive performance Using Operating Systems Networks

Midterm

Finale

Finale P r i n ti n g

Today’s world users can’t imagine working without a Printer. Printing is essential in most workplace to share budgets, memos & other purposes.

Types : Most popular Three Types of Printers

LASERDOT MATRIX INK JET

DOT MATRIX : Most Commonly used Printing Devices. It works Produce Sheets of Plain Text very Quickly.

Speed : Slowest 50-70 Characters & Fastest 500 CPS Per Second

Resolutions : Lowest 9 Pins & Highest 24 Pins

Finale P r i n ti n g

LEASER : Laser is more expensive than Ink Jet Printers & Quality is Higher & Faster.It works like Electronic Gun to Target any Pixel.

Resolutions : 300 0r 600 both Vertically & Horizontally

INK JET : It Create Image directly on the paper by Spraying ink through Tiny Nozzles

Color: It’s have four Nozzles - > Blue/ Magenta (Red)/ Yellow & Black

Same As Non-Impact

Printer

Processing DataDATA : Data Consist of the raw numbers that computers organize to produce Information

BITS: A Single Units of Data is Called Bit& 8 bit make up on Byte. Text Codes : A system, numbers would represent the letters, punctuation marks & other Symbols. 04 Most popular Text Code Systems are-

UNICODE

EXTENDED ASCII

ASCII

EBCDIC

CPU : CPU is the “brain’ of the computer where data is manipulated.

CONTROL UNIT

CPU has Two Basic Parts

ARITHMETIC LOGIC UNIT

MEMORY : The CPU needs to have millions of bytes of Space when it can quickly read or write program & data & is called Memory.

02 TYPES

Non VolatileNonvolatile chips hold data even the computer is

unplugged

VolatileMemory lose their contents when the computers

power is shut off

PROM – Programmable read only memory

ROM RAM

FLASH MEMORY : This is Special Type of non Volatile Memory, It Used in Portable digital devices for Storage. Different Types

Digital Camera MP3 Player USB Game

Consoles

THE BUS : A bus is a path between the Components of a computer. System bus has two parts.

Data Bus Address Bus

Magnetic Storage Devices

Types of Storage Devices

Diskettes Hard Disk

Floppy Disk Memory Tape

FAT : File Allocation Table FAT 32: Upgrade Version FAT 16: It was used in MS-DOS Early Windows Operating System

OPTICAL STORAGE DEVICES: The most Popular alternatives to magnetic Storage Systems

CD-ROM , DVD-ROM, CD-R, CD-RW, DVD-RW, DVD-RAM, PHOTO CD

Measuring & Improving drive performanceDISK CLEANUP : Built-in- Utility called Disk Cleanup or Uninstalling

FILE COPMRESSION : File Compression or data Compression is the Technology for Shrinking the Size of a File to keep more Data.

WINZIP: Is Compressim for PC

Using Operating SystemsOS : Software Program & Master Control Program. It Organize 04 major Types

REAL TIME / Single Tasking User/ Single User Multi Tasking / Multi User Multi Tasking

Using Operating Systems

GUI : Pronounced Goo-ee is a graphical user interface short form GUI

RIGHT CLICK : Clicking on right side of the windows, a small menu appears. The most common command associated with the object.

SCREEN SAVERS : This is Popular Utilities although they serve little purpose. Automatically appears keyboard or pointing device.

MENU BAR : Program windows Horizontal List called Menu Bar

Networks

NETWORK : Set of Technologies Including Hardware, Software & Media. To Share Data & Programs.

Common Type of Networks

LOCAL AREA NETWORKS (LANs)WIDE AREA NETWORKS (WANs)

HYBRID NETWORKSMETROPOLITAN AREA NETWORKS (MANs)

CAMPAS AREA NETWORKS (CANs)HOME AREA NETWORKS (HANs)

WIRE-BASED MEDIA : The most common media for data communications are Twisted pair wire. Example- Coaxial/ Fiber Optic / Wireless links

WIRELESS MEDIA : This network use Radio signals through the Air or either for Transmission Data. Use also Satellite & Microwave Communication.

GATE WAY : To create a communication between different types of network placed at a junction between two or more Networks.PROTOCOL : A Protocol as an agreed upon format for transmitting data between two devices.

TCP / IP, IPX / SPX & NET BIOS

Midterm1 Introducing Computer Systems2 Looking Inside the Computer System3 Interacting with your computer4 Inputting Data in Other ways5 Video & sound6 The Internet & the world wide web7 email & other Internet Services

COMPUTER : A computer is an electronic device that process data, converting it into Information.Example – Analog / Digital

COMPLETE COMPUTER SYSTEM

HARDWARE / SOFTWARE/ DATA / USERSCOMPUTER HARDWARE : MAJOR 04 CATEGORIES

PROCESSOR – LIKE THE BRAIN MEMORY

INPUT & OUTPUT STORAGE

INPUT DEVICES : Keyboard & MouseOUTPUT DEVICES : Monitor & Printer

DATA : Data can be Text, Numbers, Sounds & ImagesINFORMATION : Using all parts together a computer converts data into Information by performing various actions on the data.

OPERATING SYSTEM : An operating system tells the computer how to use its own component

Windows Linux Mac ox

Hardware & Software

SoftwareHardware

GRAPHICS CARD & MORE

PROCESSOR

STORAGE

MOTHER BOARD

RAM

MS EXCEL

MS WORD

SOUND

MS OFFICE

WINDOWS (OS)

ADOBE

Most Major KeyboardALPHANUMERIC KEYS - QWERT

THE CURSOR – MOVEMENT KEYS - By Without Using Mouse

THE MODIFIER KEYS – Shift/ALT & CTRL

NUMERIC KEYPAD – Right Side Keyboard With 10 Digits Operations

THE FUNCTIONAL KEYS – F1, F2, & More

Chat

Instant Message

Electronic Mail

News

& More…

File Transfer Protocol (FTP)

Online Service

Network of Networks

Email In Business Communication

Fastest Modern Business Communications Guider.

Out Sourcing

Record Keeping Low Cost

Networking

Marketing

Job & Career Development

Informat ion Technology In Tourism Indus try

Transport Computer Reservation

System (CRS)

Global Distribution Systems

Tourism Marketing

THE END