What is Information Technology?

Technology that enables information to be used to produce products and services.

What Is A Computer?

• An electronic device that receives data, processes data, stores data, and produces a result (output).

Information Processing

Cycle

1. Input Device

2. CPU

3. Output Device

4. Storage

Hardware-Physical Parts of the computer

Modem- connects your computer to the Internet

CPU- Central Processing Unit is the brain of your

computer.

Hardware, Hardware

Input, Output, & Storage Devices

• Input device: hardware that allows you to communicate with your computer.

• Output device: hardware that allows your computer to communicate with the user

• Storage device: allows you to store or retrieve information

Computer Input Devices

• Keyboard

• Mouse

• Trackball

• Joystick

• Light Pen

• Pointing Stick

• Touchpad

• Touch Screen

• Bar Code Reader

• Scanner

• Microphone

• Graphics Tablet

• Digital Cameras

Computer Output Devices

• Monitor: screen that displays information such as text, numbers, and pictures.

– Softcopy

• Printer: gives you information from the computer in printed form.

– Hardcopy

• Speakers: allow you to hear voice, music, and other sounds from your computer.

STORAGE

1. CD-ROM

(Compact Disk- Read Only Memory)

2. 3 1/2 “ Floppy Disk

(“A” Drive)

Besides saving to the hard drive, here are some other ways to save:

3. External Storage

( Flash Drive, Memory Stick,

etc.)

Memory

• ROM- Read Only Memory

• RAM- Random Access Memory

(Temporary or working memory)

One unit of computer memory is called a “byte”.

Units of Memory

1

1000

1,000,000

1,000,000,000

1 byte stores one character of data

1000 bytes is a kilobyte

1 million bytes is a megabyte

1 billion bytes is a gigabyte