Welcome to CMPE003 Personal Computer Concepts: Hardware and Software Winter 2003 UC Santa Cruz Instructor: Guy Cox

First Assignment Details on the class web page: Due Monday January 13, 2003  Must be received by 11:59 PM

1 st Homework: Due January 13, 2003 NOTE:  This homework must be completed successfully to continue in this class  If this homework is not received by the due date, you will be dropped from the class  No adds will be allowed after this due date (assuming there is any room)

Computers: Tools for an Information Age Chapter 1 Part b

Chapter Objectives Describe the three fundamental characteristics of computers  Speed, reliability & storage Describe at least four areas of society in which computers are used Identify the basic components of a computer system:  input, processing, output, and storage (IPOS) List some common input, output, and storage media Distinguish raw data from information Describe the significance of computer networks Explain the significance of the Internet Explain the various classifications of computers

Where Computers Are Used: The Home Educational tool Record keeping Letter writing Budgeting Drawing and editing pictures Newsletters Connecting with others

Where Computers Are Used: Health and Medicine Monitor patients Electronic imaging Diagnose illnesses

Where Computers Are Used: Robotics Perform jobs that are dangerous for humans Factory work Bomb squad

Where Computers Are Used: The Human Connection Assist the disabled Assist athletes by monitoring their movements

Where Computers Are Used: Science and Communications The Sciences Research Simulation Connectivity Communication Telecommuting

Where Computers Are Used: Training and Paperwork Training Airline pilots Railroad engineers Paperwork Junk mail Documents Record keeping

Become Computer Literate Be aware of the computers around you Learn about how they work Interact with them, use them

Computers are all around! Grocery store School Library Bank Mail We interact with computers everyday! We interact with computers everyday!

Computer System People Software Hardware

People Hardware Engineers –  People who design and build computers Software Engineers (programmers) –  People who design and write software programs Users or End-users –  People who make use of the computer’s capabilities

Software Programs Set of instructions that directs the hardware to do a required task and produce the desired results

Hardware – Basic Components of a Computer

Computer A machine that can be programmed to accept data (input), process it into useful information (output), and store it away (in secondary storage device) for safekeeping or later reuse Processing is directed by software and performed by the hardware

Function of Computer System Data handling IInput PProcess OOutput SStorage

Input Devices Accept data or commands and convert them to electronic form (raw data) Getting data into the computer  Typing on a keyboard  Pointing with a mouse  Scanning with a wand reader or bar-code reader  Terminal Microphone Camera

Output devices Monitor or screen Text Numbers Symbols Art Photographs Video Printer Black and white Color Convert from electronic form to some other form May display the processed results Usable information Speakers Music CDs, DVDs

The Processor Central Processing Unit (CPU) Interprets and executes instructions Communicates with input, output and storage devices Converts raw data to useful information

Two Types of Storage Primary storage or memory -- temporary storage Secondary storage -- long-term storage

Memory / Primary Storage Temporary storage Holds input to be processed Holds results of processing Contains the programs to control the computer and manipulate input into output Volatile  When you loose/turn-off power, it’s gone

Secondary Storage Long-term storage Non-volatile Caveat -- “Bit rot” Data can be lost or changed over time

Secondary Storage Examples Magnetic disks – read and written by magnetic disk drive  Hard disk  Diskette Optical disks – read and written by optical disk drives  CD-ROM  DVD-ROM Magnetic tape – read and written by magnetic tape drives  Primarily used for back-up