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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