Computer Input Devices

Input and Output Devices

• Input devices allow users to enter data into a computer system
• Examples of input devices include:
  • Keyboard
  • Pointing devices (mouse, trackball, joystick, digitizing tablet)
  • Pick devices (light pen, touch screen)
  • Source data entry devices (audio input device, video input device, optical input devices)

Source Data Entry Devices

• Audio input device: captures sound or voice inputs
• Video input device: captures video inputs
• Optical input devices:
  • Scanner: reads printed or written text and images
  • Optical Character Recognition (OCR): recognizes and extracts text from images
  • Magnetic Ink Character Recognition (MICR): recognizes and extracts text from magnetic ink characters
  • Optical Mark Recognition (OMR): recognizes and extracts data from marked forms
  • Barcode reader: reads and extracts data from barcodes

Output Devices

• Hard copy devices:
  • Printer: prints text and images on paper
  • Plotter: prints large-format documents and images
  • Computer output on microfilm: stores data on microfilm
• Soft copy devices:
  • Monitor: displays text and images on a screen
  • Visual Display Terminal: displays text and images on a screen
  • Video output: displays video outputs
  • Audio response: outputs audio responses

Internet and Internet Services

• Introduction to the Internet:
  • History of the Internet
  • Internetworking protocol
  • Internet architecture
• Connecting to the Internet:
  • Dial-up access
  • Leased line
  • Integrated Services Digital Network (ISDN)
  • Digital Subscriber Line (DSL)
  • Cable modem
• Internet services:
  • World Wide Web (WWW):
    • Web browser
    • Uniform Resource Locator (URL)
    • Internet search engines
    • WWW development languages
  • Electronic mail (Email):
    • Email address
    • Email message format
    • Email services
    • How email works
  • File Transfer Protocol (FTP):
    • How FTP works
  • Terminal Network (Telnet)
  • News
  • Internet Relay Chat (IRC)

Windows XP

• Features of Windows XP:
  • The desktop
  • The start menu
  • The window
  • The view
  • Selecting files
  • Working with folders
  • Files and folders properties
• Windows XP explorer:
  • The start menu
  • The window
  • The view
  • Selecting files
  • Working with folders
  • Files and folders properties
• Configuring Windows XP:
  • Configuring the screen
  • Configuring the mouse
  • Adding or removing programs
  • Adding new hardware
  • System tools
  • The scandisk
  • Windows XP media player
  • Windows XP help

Word 2007

• Introduction to Word 2007:
  • Starting MS-Word
  • MS-Word screen and its components
• The Office button:
  • The home tab
  • The insert tab
  • The page layout tab
  • The references tab
  • The mailings tab
  • The review tab
  • The view tab
  • The help
• Solved examples:
  • Exercises

MS-Excel 2007

• Introduction to MS-Excel 2007:
  • Starting MS-Excel
  • Basics of spreadsheet
  • MS-Excel screen and its components
• The Office button:
  • The home tab
  • The insert tab
  • The page layout tab
  • The formulas tab
  • The data tab
  • The review tab
  • The view tab
  • The help
• Solved examples:
  • Exercises

MS-PowerPoint 2007

• Introduction to MS-PowerPoint 2007:
  • Starting MS-PowerPoint
  • Basics of PowerPoint
• MS-PowerPoint screen and its components:
  • The office button
  • The home tab
  • The insert tab
  • The design tab
  • The animations tab
  • The slide show tab
  • The review tab
  • The view tab
  • The help
• An example:
  • Exercises

MS-Access 2007

• Introduction to MS-Access 2007:

  • Starting MS-Access
  • Database terminology

• MS-Access screen and its components:

  • The office button
  • The home tab
  • The create tab
  • The external data tab
  • The database tools tab
  • The help

• Solved examples:

  • Exercises### Introduction to Computer

• Digital and analog computers are two types of computers.

• Characteristics of computers include:

  • Speed
  • Accuracy
  • Diligence
  • Storage capability
  • Versatility

History of Computer

• Calculating machines were the first computers.
• Napier's bones, slide rule, and Rascal's adding and subtraction machine were early calculating machines.
• Leibniz's multiplication and dividing machine was another early computer.
• Punch card system was used in early computers.
• Babbage's analytical engine and Hollerith's punched card tabulating machine were significant inventions.

Classification of Computers

• Microcomputers:
  • Desktop computer or Personal Computer (PC)
  • Notebook computers or laptop
  • Netbook
  • Tablet computer
  • Handheld computer or Personal Digital Assistant (PDA)
  • Smart phones
• Minicomputers
• Mainframe computers
• Supercomputers

Generations of Computer

• First generation (1940 to 1956): Used vacuum tubes.
• Second generation (1956 to 1963): Used transistors.
• Third generation (1964 to 1971): Used integrated circuits.
• Fourth generation (1971 to present): Used microprocessors.
• Fifth generation (present and next): Uses artificial intelligence.

Computer System

• Hardware
• Software
• Data
• Users

Input-Process-Output Concept

• Input unit
• Processing unit
• Output unit

Components of Computer Hardware

• Input/output unit
• Central processing unit
• Storage unit