Lecture Exam Monday 5:30 - 6:30 bring a blue bubble sheet lab sections 10, 11, 12 take test in...

Lecture Exam Monday 5:30 - 6:30 bring a blue bubble sheet lab sections 10, 11, 12 take test in

Classroom Building 302 lab sections 13, 14, 15 take test in

Classroom Building 304 lab sections 16, 17 take test in

Classroom Building 306 lab sections 19, 20 take test in Classroom Building 308

Studying for the Exam

review your class notes read the assignments from the Parker

book SW 4 through SW 8 SW 36 through SW 61 HW 4 through HW 32 HW 46 through HW 74 HW 88 through HW 121

download the review sheet http://w3.uwyo.edu/~allyson

Lab Exam Next Week

Given during your regularly scheduled lab period.

Bring a 3.5” HD diskette with you to lab - you will turn it in.

Save your files often! Budget your time.

Input and Output

The slowest component of data processing.

Input Devices

convert data and programs into a form that the CPU will

understand

Keyboards

differ with respect to: key placement and number of keys

QWERTY Dvorak

shape of the keyboard touch

data entered from the keyboard is subject to human error

Pointing Devices

A piece of input hardware that moves an onscreen pointer

Some types: mouse trackball touchscreens pointing sticks touchpads

Pointing Devices

Source Data Automation

The process of collecting data at their point of origin in digital form

eliminates: duplicated effort delay extra handling errors

Optical Character Recognition

The use of reflected light to input marks, characters, or codes

Types: optical marks optical characters optical codes

bar codes, POS systems

Other Types of Automated Data Entry

Magnetic Ink Character Recognition (MICR) image scanners digital cameras handwriting recognition devices magnetic strips smart cards biometric systems voice-input devices

AIEEWAHNTODUHPAHSZEHT

Eye went toad a posse it Aye one toe dub a set I want to deposit

Output Devices

Convert bits into a form that is understandable to humans

display devices printers speakers

need a sound card voice output devices

Display Devices

video display terminal (VDT) monitors

dot pitch resolution graphics standards

VGA, SVGA Flat Panel Displays

liquid crystal displays

Printers quality of print

dots per inch (dpi) 1440 x 720 dpi

speed of printer pages per minute (ppm)

16ppm b&w; 5ppm color

some have network cards and memory

Dots per inch

Impact Printers

Pins press into an ink soaked ribbon forcing ink onto the page.

Advantages: economical to buy and run can print multipart forms

Disadvantages noisy, slow

Character Formation on a Dot-Matrix Printer

Printers

Nonimpact printers ink jet laser

Copyright (c) 1998 by Harcourt Brace & Company. All rights reserved.

Voice Output Devices Two types

digitize voice message, store, convert back to voice message

synthetic speech stores words and creates sentences