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2.00 Understand Computer Fundamentals. Unit Objective: 2.01. What Is A Computer?. An electronic device that receives data, processes data, stores data, and produces a result (output). Classified by size, speed and application Uses hardware and software Comes in different types.

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What is a computer l.jpg
What Is A Computer?

  • An electronic device that receives data, processes data, stores data, and produces a result (output).

  • Classified by size, speed and application

  • Uses hardware and software

  • Comes in different types


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Types of Personal Computers

  • Desktop computer:designed to be used on a desktop.

  • Notebook/Tablet computer:designed to be used on a desktop but still small enough to be portable.

  • Laptop computer:designed to be small enough and light enough to be used on your lap.


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Hardware

  • The tangible, physical equipment that can be seen and touched such as:

    • Computer Case

    • Monitor

    • Keyboard and Mouse

    • Disk Drive

    • Speakers


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Computer Components:Hardware

  • Hardware –

    the physical equipment of the computer that you can see and touch


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PARTS OF A COMPUTER SYSTEM

Monitor

Speaker

Keyboard

Computer Case (Processor inside)

Mouse

CD-ROM/DVD Drive

Printer

Floppy Disk Drive


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CPU (Central Processing Unit)

The “brains” of the computer housed on a tiny silicon chip inside the computer case.

Floppy Disk Drive

CD-ROM/DVD Drive

Monitor

Keyboard

Mouse

Speakers

Printer

Scanner

The Parts A of Computer


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Keyboard

Mouse/Trackball

Joystick

Light Pen

Pointing Stick

Touchpad

Touch Screen

Bar Code Reader

Scanner

Microphone

Graphics Tablet

Digital Cameras

Input Devices


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Output Devices

  • Monitor: screen that displays information such as text, numbers, and

  • Printer: gives you information pictures.

    • Softcopy

    • from the computer in printed form.

    • Hardcopy

  • Speakers: allow you to hear voice, music, and other sounds from your computer.


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Processing Device

  • Central Processing Unit (CPU) – known as the heart or “brain” of the computer and is responsible for processing the information that has been entered into the computer


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Hard Disk Drive: used to store data inside of the computer.

Magnetic platter that holds a large amount of information in a form the computer can understand.

Floppy Disk: flat circles of iron oxide-coated plastic enclosed in a hard plastic case.

Most are 3 ½ inches and have a capacity to hold 1.44 MB or more of data.

CD ROM Drive:a compact disk that reads only memory.

CD-RW: a device that allows you to read and write to a compact disk

Storage Devices


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Internal Storage:

Allows you to store

information inside of the

computer

Hard Drive:

Allows the fastest access

to information

RAM (Random Access

Memory) – temporary

ROM (Read Only Memory) -

long-term memory

External Storage:

Allows you to use devices to

store information outside

of the computer

Floppy Disks

CD-ROMs (Compact Disc

Read Only Memory)

CD-RW (Compact Disc

(ReadandWrite)

DVDs (Digital Video Disc)

USB/Jump Drives

Storage Devices (Con.)


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Which Storage Device Holds The Most Information?

FLOPPY DISKS

1.44 MB

CD-ROM DISC

640 MB

HARD DRIVES

80 and above GB

DVD DISC

17 GB


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Software

  • The intangible set of instructions that tells the computer what to do; known as programs or software programs.


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Types of Software

  • Operating System Software

    • Sets the rules for how computer hardware and application software work together, controls the operation of the computer.

      • Example: Windows

  • Application Software

    • Lets you accomplish specific tasks based on your needs.

      • Examples: MS Word, Excel, Access, MS Works


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Operating System Software Tasks

  • Boots (starts up) the computer

  • Formats disks

  • Creates folders

  • Saves and retrieves files

  • Moves and copies files

  • Every Computer Has Operating System Software!


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Application Software

  • Software that works with the operating system to meet a specific need or perform a specific task

  • Examples:

    MS Word

    MS Excel

    MS PowerPoint

    MicroType Pro

    Internet Explorer


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Types of Application Software

  • Word Processing

    • Program that allows you to create, edit, and print text documents

      • Report, flyer, memo

  • Spreadsheet

    • Numbered Rows and Lettered Columns

    • Intersection of a row and column is a cell

      • Grade book, financial info

  • Database

    • Lets you set up an electronic filing system

    • Enter text and numbers

      • Find, search, and print info in different ways

        • Address book, Card Catalog



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Input

Enters data into the

computer

Processing

Changes data into

usable form

Output

Sends data out of the

computer

Storage

Saves for use later

WHAT DOES IPOSSTAND FOR?


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What Happens During The IPOS Cycle?

  • INPUT –

    when information is entered into the computer; the computer receives information

  • PROCESSING –

    when the computer processes the information that has been entered

  • OUTPUT –

    when information leaves the computer

  • STORAGE –

    when information is stored to be used later.


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How The IPOS Cycle Works

INPUT

STORAGE

PROCESSING

STORAGE

OUTPUT


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Input device: hardware that allows you to communicate with your computer.

Output device: hardware that allows your computer to communicate with the user

Storage device: allows you to store or retrieve information

Input, Output, & Storage Devices


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