INFORMATIONPROCESSING

CYCLE

What is a computer?

• A computer is a machine that receives data and processes that data in some way to produce information.

• A computer is an electronic device that accepts data, performs computations, and makes logical decisions according to the data it is given, to produce information in a form that is meaningful to humans.

How does a computer process information?

In fo rm ation P rocess in g C yc le

In p u t P rocess in g O u tp u t

S to rag e

Definition of Input

Definition of Output

Definition of Processing

INPUT DEVICES (p.450)

• Keyboard

• Mouse

• Joystick

• Graphics Tablet

• Touch Display

• Speech Recognition Device

• Scanners

• Sound Board

• Digital Camera

New Technology

Output Devices (p.451)

• Monitor – CRT and LCD

• Printers– Laser

– Ink Jet

• Plotter

• Microfilm

• Synthesizers

• Robots

Hardware on the Outside

• http://parenting.kaboose.com/education-and-learning/learning-resources/comp_les1.html

Processing Devices (p. 452)

• CPU – Stores data and programs, executes program instructions and performs operations (THE BRAIN)

• Motherboard– Tells EVERYBODY what to do

• Memory (short-term and long-term)– ROM (Read Only Memory) – permanent/unchanging

– RAM (Random Access Memory) – can be added to

Hardware on the Inside

• http://resources.kaboose.com/brain/comp-les2.html

STORAGE DEVICES (p. 453-455)

• Hard Drive

• Diskette (Floppy) Drive

• CD

• DVD

• Can you name others?

• SIM Card

• USB Drive

• Camera Card

http://resources.kaboose.com/brain/comp_les4.html

PROCESSING CYCLE

• RETRIEVE INSTRUCTION

• DECODE INSTRUCTION

• EXECUTE INSTRUCTION

• STORE RESULT