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Computer Applications Computer Basics Part 1


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Title: Computer Applications Computer Basics Part 1

Computer ApplicationsComputer Basics Part 1
Definition of Computer
  • An electronic device, operating under the control
    of instructions stored in its own memory, that
    can accept data (input), process the data
    according to specified rules (process), produce
    results (output), and store the results (storage)
    for future use.

Computers Have Two Main Parts
  1. Computer Hardware
  2. Computer Software

What is Computer Hardware?
  • Computer Hardware is the physical part of the
    computer system, the machinery and equipment.
  • Parts of the computer you can see

Examples of Computer Hardware
Monitor T.V. like screen used to show pictures
and words
CPU Central Processing Unit this is where most
of the computers calculations take place. In
terms of computing power, the CPU is the most
important element of a computing system.
Keyboard This device is used to type information
into the computer and contains the numbers 0-9.
More Computer Hardware
Mouse a small device, which you move across the
top of the desk to move the pointer or cursor on
the screen.
Printer used to make a paper copy of the
information into the computer.
Image Scanner an electronic device that
generates a digital representation of an image
for data input to a computer
Computer Software
  • Defined- a system of programs that tell the
    computer what to do.
  • Some people want to use the power of their
    computer to create works of art, others want to
    create music, or play games, surf the web, or
    play the stock market. Whatever you want to do
    with your computer, software is the key to doing

Examples of Computer Software
  • Computer Applications- OUR CLASS!!
  • Word Processing used to create, edit, format
    and print documents. Ex Word
  • Spreadsheet used to add, subtract and perform
    calculations in rows and columns of numbers. Ex
  • Database User can enter, retrieve and update
    data. Ex Access
  • Presentation allows user to create slides for
    use in a presentation to a group. Ex PowerPoint

Computer Input Devices
  • Computer Devices that input information in the
  • Keyboard
  • Mouse
  • Digital Camera
  • Microphone
  • Scanner
  • Touchpad

Computer Output Devices
  • Computer Devices that output information from the
    computer. Examples
  • Monitor
  • Printer

General Understanding of how your
computer works-
  • OverviewTo understand anything it helps to break
    it down into it's basic components. Then you need
    to know how each component works. Finally you
    look at how all the components work together to
    achieve the desired end product or result.

  • MotherboardIt is the main circuit board inside
    the CPU case. It holds the microprocessor, memory
    and other crucial circuits and components that
    control the operation of the Personal Computer.
    Every device inside or connected to a Personal
    Computer finds it's way to this board.

  • Memory-The mother board takes the input you give
    it and produces output for you like displaying or
    printing a file. It can't do this without memory.
    The PC operating system used by the PC is copied
    from storage to memory at power up. Memory is
    volatile which means that when your PC is turned
    off the contents of memory are lost. It is
    completely blank and must reloaded each time its
    turned on.
  • Random Access Memory (RAM)
  • electronic components that temporarily store
    instructions waiting to be executed by the
    processor, data needed by those instructions, and
    the results of processed data.
  • Consists of chips on that memory module that fits
    into slots on the memory board.

  • StorageRetains information even when it is
    powered off. It stores programs which run the PC
    as well as data, which is a digital form of
    everything you use like documents, music,
    pictures, etc.
  • Hard Disks- Miniature
    Mobile Storage Media-
  • Flash memory cards solid state media, which
    consists entirely of electronics (no moving
  • Flash drive (pen drive or thumb drive) flash
    memory portable storage device that plugs into
    USB port
  • Smart Card stores data on a thin microprocessor
    embedded in the card about the size of a credit

Computer Parts
Computer Basics Part 2
Basic Computer Terms and Definitions
  • CPU Central Processing Unit
  • What- Brain of the computer
  • Purpose- Processes the software program.
  • -CPUs primary functions include getting
    information from the computers memory.  
  • Desktop What- First screen that you see when any
    Windows operating system screen is up and
  • Purpose- to make it easier to access different
    application programs, files and documents.
  • File What- Unit for storing information
  • Purpose- information can be retrieved from the
  • Examples- a word-processing document, a
    spreadsheet, a picture,
  • Folder  What- Method for organizing files
  • Purpose- can organize by related by topic, by
    purpose, by type, by program, or even by a
    project that you are working on.
  • Operating System What-Software that acts as an
    interface between you, the application software.
  • Purpose- carrying out basic instructions that
    operate a computer like recognizing information
    from the keyboard and mouse, sending information
    to monitor, printer, or speakers and scanners,
    storing information to the hard drive and
    removable drives.
  • Examples- accesssing the Internet, word
    processing such as windows XP, Windows 2000,
    Windows ME, and MAC OS.

Uses of a Computer
  • Computers in Daily Life
  • Accounts
  • Games
  • Educational
  • On-line banking
  • Smart ID cards
  • Supermarkets
  • Working from home (Tele-working)
  • Internet

The Value of Backup!
  • The most important thing that you store on your
    computer is information.
  • Often the contents of a hard disk can represent
    years of work.
  • For this reason it is VITAL that you take
    regular backups of the information that is stored
    on the computer.
  • Use 'off-site' storage
  • Understand the Importance of shutting down your
    computer properly

Create a good working environment
  • Frequent breaks away from the computer
  • Appropriate positioning of screens, chairs and
  • Good lighting and ventilation.
  • Make sure that cables are safely secured
  • Also be aware of
  • Glare from screens
  • Bad posture

  • Icon What- small picture that represents
    processing options such as programs, documents,
    and shortcuts. 
  • Purpose-When you click on the icon, the file or
    program will open.   
  •  Input What-the data such as numbers, letters,
    words, images, video, and music
  • Purpose-computer input includes commands and
    user response. A command directs the computer
    to execute tasks or perform certain activities.
  • Example-The command buttons OK, Cancel and Help
    seen on the Shut Down Windows dialog box.
  • Keyboard What-input device that allows you to
    enter letters, numbers and symbols into your
  • Purpose- The keyboard keys include letters
    and numbers, numeric keypad, special function
  •  Hard Copy What-usually refers to a printout on
  • Menu What-a list of options to choose from.
  • Purpose- commands or other options from which
    you can choose from
  • Mouse What-the most common input device for a
  • Purpose- used to control the movement of the
    pointer on the screen. Technically, there are
    many operations that are much easier to perform
    with a mouse than a keyboard because you can just
    point and click to select an item on a screen or
    choose an item from a list of options. 

Likes/Dislikes of a computer
  • Things computer like
  • Good ventilation
  • Clean environment
  • Things computer dont like
  • Dust
  • Drinking and eating over the keyboard
  • Heat, Cold or Moisture
  • Dont place objects on top of monitors.

Networks the Internet
  • Network collection of computers and devices
    connected together, often wirelessly, via
    communication devices and transmission media.
  • Internet - worldwide collection of networks that
    connects millions of businesses, government
    agencies, educational institutions, and

World Wide Web WWW
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