INFORMATION PROCESSING CYCLE Solid Blue Boxes with Video Cameras or pictures are actually links to videos. Click on them to advance to the web to watch. 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? Information Processing Cycle Storage Input Processing Output Definition of Input Definition of Output Definition of Processing INPUT DEVICES (p.450) • • • • • Keyboard Mouse Joystick Graphics Tablet Touch Display New Technology • Speech Recognition Device • Scanners • Sound Board • Digital Camera Output Devices (p.451) • Monitor – CRT and LCD • Printers – Laser – Ink Jet • • • • Plotter Microfilm Synthesizers Robots Hardware on the Outside • http://parenting.kaboose.com/educationand-learning/learningresources/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 Hardware on the Inside • http://resources.kaboose.com/brain/comples2.html STORAGE DEVICES (p. 453-455) • • • • • • • • Hard Drive Diskette (Floppy) Drive CD DVD Can you name others? SIM Card USB Drive Camera Card • Memory (short-term http://resources.kaboose.com/brain/comp_les4.html and long-term) – ROM (Read Only Memory) – permanent/unchanging – RAM (Random Access Memory) – can be added to PROCESSING CYCLE • • • • RETRIEVE INSTRUCTION DECODE INSTRUCTION EXECUTE INSTRUCTION STORE RESULT