????????? Input

1
????????? Input

• ?????? - Data
• ??????? - Program
• ????????? - Command
• ?????????????????????? - User Responses

2
General Input Device

• Keyboard
• Pointing Device
• Mouse Click , Double Click , Drag
• Trackball
• Joystick
• Pen
• Touchscreen
• Touchpad
• Scanner Bar code reader - used in POS(Point of
  sale system)

3
General Input Device

• Source Data Automation Documents
• Bar code reader
• OMR(Optical Mark Recognition)
• OCR (Optical Character Recognition)
• MICR(Magnetic Ink Character Recognition)
• Image Scanner

4
Multimedia Input Device

• Microphone
• Speech Recognition Device
• Digital Camera
• Video Camera

5
Keyboard

http//www.datahand.com/products.html
6
Keyboard Layout
http//www.zdwebopedia.com/Dvorak_keyboard.htm
7
Input Data Accuracy

• ???????????????????????? VS. ?????????????????
• GIGO - Garbage In Garbage Out
• ?????????????????????????????????????????????
  ????
• ????????????????????
• ???????????????????????????
• ??????????????????????????????????? ??????????????