INFORMATION TECHNOLOGY

VON NEUMANN MODELA COMPUTER SYSTEM IS MADE OF:

INPUT DEVICES

OUTPUT DEVICES

HARDWARE+

SOFTWARE

RAM ROM

CPUCONTROL

UNIT + ALU

MASS STORAGE

SCREEN

KEYBOARD

HARDWARE

HARDWARE IS WHAT WE CAN TOUCH AS FOR EXAMPLE THE MONITOR,THE KEYBOARD, THE MOUSE, THE PRINTER, THE WEBCAM……

A LAPTOP

FLEXIBLE KEYBOARD

KEYBOARDS

A computer keyboard is like a typewriter keyboard. It has the alphabet letters,the numbers, the punctuation and extra keys for control purposes.

SPACEBAR

ARROWS

INPUT DEVICES

INPUT DEVICES SUPPLY DATA TO THE COMPUTER. THEY ARE:- KEYBOARD- MOUSE- JOYSTICK- SCANNER- SCANNING DEVICE- DIGITIZING TABLET- TOUCH-SENSITIVE SCREEN- MICROPHONE

SUPERCOMPUTER

MAINFRAME

MINICOMPUTER

PERSONAL COMPUTER

TYPES OF COMPUTER

GAME CONTROLLER

Computer games are controlled by games paddles o joysticks; both are based onsmall levers which can be moved in various directions.

OUTPUT DEVICES OUTPUT DATA FROM THE COMPUTER. THE MOST IMPORTANT ARE:• DISPLAY SCREEN • VDU (VISUAL DISPLAY UNIT• PRINTERS (LASER PRINTER, INK-

JET PRINTER)• PLOTTER (they are used to produce

drawings, diagrams and other types of graphical output)

OUTPUT DEVICES

MASS STORAGE

Floppy disk

Zip disk

Hard disk

CD ROMCD RCD RWDVDdisk

Magnetic tape

MOTHERBOARD

It is the central printed circuit board.It holds a lot of the crucial components of the system.It provides connectors for other peripherals.

WHAT IS ROM?

ROM IS THE READ ONLY MEMORY.DATA SAVED WITH ROM CAN’T BE CHANGED.IT IS USED FOR OPERATING SYSTEMS, CD-ROMS AND OTHER PROGRAMS.

CPU + CLOCK

CPU can be considered the brain of the computer. It performs the calculations, runs the programs and generally controls what the computer does.

WHAT IS RAM?

IT IS THE RANDOM ACCESS MEMORY. IT’S THE TYPE OF MEMORY WE USE TO SAVE OUR WORK TO THE HARD DISK OR A MEMORY KEY.

RANDOM – NOT SEQUENTIAL it is a volatile memory, not permanent and the information stored in it is lost when the computer is turned off.

PEN DRIVEUSB MEMORY

STICK

NETWORK HUB

WIRELESS HUB

TECHNOLOGYCOMMON WORDS

• TOOLBAR• MENU• ICON• CURSOR• MEMORY• BUG/VIRUS• A DOCUMENT• A BACK-UP COPY• DATABASE• SPEAKER• KEYBOARD• PEN DRIVE• CPU• ROM=READ ONLY MEMORY• RAM=RANDOM ACCESS MEMRY• APPLICATION• FILE• FOLDER• FONT• WWW= WORLD WIDE WEB• LAN= LOCAL AREA NETWORK

COMMON VERBS• TO PLUG IN=COLLEGARE• TO TURN ON/OFF• TO DELETE• TO STORE/ TO SAVE• TO COPY• TO HIGHLIGHT• TO TRANSFER• TO DRAG• TO CUT• TO PRINT• TO SELECT• TO SURF• TO CONNECT• TO CHAT• TO RECEIVE• TO SEND • TO DOWNLOAD• TO LOG IN/OUT• TO MOVE A FILE• TO INSTALL