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

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Presentation on theme: "Welcome to CMPE003 Personal Computer Concepts: Hardware and Software Winter 2003 UC Santa Cruz Instructor: Guy Cox."— Presentation transcript:

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

3 January 23, Assignments Homework #4 – Due February 12 (That’s due next Wednesday )  Design your own resume  Must use a Word Processor (ie, M$ Word) Notepad will not suffice.  Details and sample resume – see class page – ml

4 Input and Output: The User Connection Chapter 5 Part A

5 January 23, Objectives Describe the user relationship with computer input and output Explain how data is input to a computer system and differentiate among various input equipment Describe how a monitor works and the characteristics that determine quality List and describe the different methods of computer output Differentiate among different kinds of printers Explain the function of a computer terminal and describe the types of terminals

6 January 23, Input and Output Input Users submit input data Output Users get processed information

7 January 23, Input Data from the user to the computer Converts raw data into electronic form

8 January 23, Diversity of Input Methods Zebra-striped bar codes on supermarket items Word commands operate a forklift truck An order is entered using a pen on a special pad Time clock generates paycheck Data on checks are read and used to prepare a monthly bank statement Charge-card transactions generate customer bills

9 January 23, Keyboard Traditional  Looks like typewriter with extra keys Non-traditional  Fast food restaurants  Each key represents a food item rather than a character

10 January 23, Keyboard Function Keys Give commands Software specific Main Keyboard Typewriter keys Special command keys

11 January 23, Keyboard Numeric Keys  Num Lock – toggle  On – n umeric data & math symbols  Off – cursor movement Cursor Movement Keys

12 January 23, Keyboard: Special Keys Enter Esc Alt Ctrl Caps Lock Shortcut Windows Shift

13 January 23, Pointing Devices Position a pointer / cursor on the screen Controls drawing instruments in graphics applications Communicate commands to a program

14 January 23, Pointing Devices: Mouse Types  Mechanical  Optical  Wireless Features  Palm-sized  1 or 2 buttons  Wheel

15 January 23, The First Mouse Doug Engelbart invented the computer mouse in as part of an experiment to find better ways to point and click on a display screen. It was made in a shop at SRI. The casing was carved out of wood. The mouse had only one button - that was all there was room for. Invented by Doug Englebart at SRI, 1963/4

16 January 23, The First Mouse Invented by Doug Englebart at SRI, 1963/4 Two wheels mounted perpendicularly to each other in the mouse's underbelly tracked the X- Y motion. The mouse was patented in 1970 as an "X-Y Position Indicator."

17 January 23, Early Workstation – Circa 1967 Close-up of first production model of the mouse 1967, this model made of plastic casing with metal underbelly, same wheel design, now with three buttons.

18 January 23, Keyset, Mouse and Keyboard: Circa 1968 A 1968 mouse-keyset combination installed on an ergonomic keyboard-console. This is the first production model of the mouse with plastic casing and metal underbelly, and with three buttons. This setup was used for the famous "mother of all demos" during the 1968 Fall Joint Computer Conference and included a tilt-swivel office chair. The assembly was custom-made by the Herman Miller furniture company.

19 January 23, Other Pointing Devices Trackball  Upside-down mouse  Ball on top  Roll ball with hand  Laptop computers Touchpad  Pressure-sensitive pad  Cursor moves as you slide your finger  Laptop computers

20 January 23, Other Pointing Devices Pointing stick Pressure-sensitive post Mounted between G and H keys on keyboard Apply pressure in a direction to move cursor Joystick Short lever Handgrip Distance and speed of movement control pointer position

21 January 23, Graphics Tablet Digitizing tablet Rectangular board Invisible grid of electronic dots Write with stylus or puck Sends locations of electronic dots as stylus moves over them Creates precise drawings Architects and engineers

22 January 23, Touch Screens Human points to a selection on the screen  Finger, pencil, etc.. Types  Edges emit horizontal and vertical beams of light that crisscross the screen  Senses finger pressure  Light pen for pointing

23 January 23, Touch Screens Kiosks  Self-help stations  Easy to use  Where found Malls Airports Disney World Government offices

24 January 23, Pen-based Computing Small hand-held devices Electronic pen (stylus)  Pointer  Handwritten input Personal Digital Assistants (PDA)

25 January 23, Source Data Automation Special equipment to collect data at the source Sent directly to a computer Avoids need to key data Related input areas  Magnetic-Ink Character Recognition  Scanners  Optical recognition devices  Voice

26 January 23, MICR: Magnetic-Ink Character Recognition Read characters made of magnetic particles Numbers on the bottom of checks MICR inscriber – adds characters to check that show amount cashed

27 January 23, Optical Scanners Optical recognition Light beam scans input data Most common type of source input Document imaging – converts paper documents to electronic form Converts snapshots into images Converts scanned image of text into characters – OCR Exact computer-produced replica of original Exact computer-produced replica of original

28 January 23, Types of Scanners Flatbed  One sheet at a time  Scans bound documents Sheetfeed  Motorized rollers  Sheet moves across scanning head  Small, convenient size  Less versatile than flatbed  Prone to errors

29 January 23, Types of Scanners Handheld  Least expensive  Least accurate  Portable  User must move the scanner in a straight line at a fixed rate  Wide document causes problems

30 January 23, Optical Recognition Optical mark recognition (OMR)  Mark sensing  Exams (Scantron )  Recognizes the location of the marks Optical character recognition (OCR)  Light source reads special characters  OCR-A is ANSI standard typeface for optical characters

31 January 23, Optical Recognition: Wand Reader Used in: Retail stores Libraries Hospitals Factories

32 January 23, Optical Recognition: Bar Code Reader Photoelectric device Reads bar codes Inexpensive Reliable Where Used?  Supermarket – UPC  Federal Express

33 January 23, Optical Recognition: Handwritten Characters Must follow rigid rules Size Completeness Legibility

34 January 23, Voice Input Speech Recognition Speech recognition devices  Input via a microphone  Voice converted to binary code Problems  Speaker-dependent  Voice training

35 January 23, Voice Input Changing radio frequencies in airplane cockpits Placing a call on a car phone Requesting stock-market quotations over the phone Command from physically disabled users

36 January 23, Voice Input Discrete word systems  Understand isolated words  Pause between words  Difficult for dictation Continuous word systems  Normal speaking pattern  Easy to use  Faster and easier to dictate than to key

37 January 23, Digital Cameras Photos stored in electronic form No film Point and shoot Edit

38 January 23,


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