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Computers Review. Computer Science – Hardware, Systems, and Software. What Is A Computer?. An electronic device operating under the control of instructions stored in its own memory unit Can accept data (input) Manipulate the data according to specified rules (process)

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computers review

Computers Review

Computer Science –

Hardware, Systems, and Software

what is a computer
What Is A Computer?
  • An electronic device operating under the control of instructions stored in its own memory unit
  • Can accept data (input)
  • Manipulate the data according to specified rules (process)
  • Produce information (output) from the processing
  • Store the results for future use.
  • What are the 4 components of the IPOS cycle?
what does a computer do
What Does A Computer Do?
  • Computers can perform four general operations
  • These operations comprise the information processing cycle and are:
    • Input
    • Process
    • Output
    • Storage
application software
Application Software
  • Application software consists of programs that tell a computer how to produce information
  • Excellent example:
    • Microsoft Access
    • Microsoft Excel
    • Microsoft Word
    • Microsoft PowerPoint
  • The word processor application (Word) software that enables you to create documents such as:
    • Reports
    • Letters
    • Memos
    • Resumes
    • Web Pages
    • Publications
  • The spreadsheet application (Excel) allows you to work with numbers to prepare items such as:
    • Budgets
    • Loan payments amortization schedules
    • Spreadsheets
    • Invoices
    • Balance Sheets and other financial statements
    • Timecard
  • The database application (Access) allows you to organize information such as:
    • Addresses
    • Home Inventory
    • Schedules
    • Ledger
    • Order Entries
    • Expenses
power point
  • The presentation application (PowerPoint) allows you to create:
    • Slides
    • Outlines
    • Speaker’s notes
    • Audience handouts
  • The schedule/organization application (outlook) increase your efficiency by keeping track of:
    • E-mail
    • Appointments
    • Tasks
    • Contacts
    • Events
    • To-do lists
desktop publisher
  • The desktop publishing application (Publisher) helps you design professional-looking documents such as:
    • Newsletters
    • Postcards
    • Brochures
    • Web sites
    • Catalogs
    • Business Cards
front page
  • The web page application (FrontPage) enables you to:
    • Create and
    • Maintain your own web site
microsoft office xp 2007
Microsoft Office XP (2007)
  • Word processor application - Word
  • Spreadsheet application - Excel
  • Database application – Access
  • Presentation application - Power Point
  • Schedule/organization application - Outlook
  • Web page application – Front Page
  • Publisher applications – Desktop Publisher
  • Integrated software is anapplication can be used together.
    • For example, numbers from a spreadsheet can be included in a letter created in the word processor or in a presentation and put on your Web page.
software matching
Software Matching
  • Match the document with which software application you would use to make it.
scavenger hunt
Scavenger Hunt
  • Log onto my wikispace.
  • Open up “1st Day Scavenger Hunt”.
  • You may work with a partner.
  • Answer the questions.
what are the components of a computer
What Are the Components of a Computer?

The five primary components of a computer are:

5 components of computer
5 Components of Computer
  • Input Devices
  • Central Processing Unit (CPU)
  • Memory
  • Output Devices
  • Storage Devices
input devices
Input Devices
  • Any hardware component that allows you to enter data, programs, commands, and user responses into a computer.
  • Examples: keyboard, mouse, digital camera, scanner, and microphone.
central processing unit
Central Processing Unit
  • CPU – contains the electronic circuits that cause processing to occur.
  • The control unit interprets the instructions.
  • The arithmetic/logic unit performs the logical and arithmetic processes.
  • Random access memory – (RAM) consists of electronic components that store data including numbers, letters of the alphabet, graphics, and sound.
memory ram
Memory (RAM)
  • The amount of memory is usually measured in:
    • kilobytes (K or KB) which equals approximately 1,000 memory locations
    • megabyte (M or MB) which equals approximately one million memory locations.
  • A memory location, or byte, usually stores one character.
  • A byte = 8 bits
output devices
Output Devices
  • Make the information resulting from processing available for use
  • Two common output devices are:
    • Printers
    • Monitors
storage devices
Storage Devices
  • Also called auxiliary storage devicesorsecondary storage devices,
  • Used to store instructions and data when they are not being used as memory
  • Type of auxiliary storage include:
    • Floppy disks
    • Hard disks
    • Compact disks
file names
File Names
  • Early versions of Windows and DOS, filenames are limited to eight characters.
  • With Windows 95 and higher versions, a filename may contain:
    • Up to 255 characters
    • Including an extension of up to 3 characters and may include spaces.
  • Log onto my wikispace.
  • Find “Exploring Computers” link.
  • Answer questions 1-12.
  • You may work with a partner.
  • A network is a collection of computers and devices connected via communications media and devices such as:
    • cables
    • telephone lines
    • modems
    • or other means.
local area network lan
Local Area Network (LAN)
  • A network that connects computers in a limited geographic area, such as a school computer laboratory, office or group of buildings, is called a local area network (LAN).
wide area network
Wide Area Network
  • A network that covers a large geographical area, such as one that connects the district offices of a national corporation, is called a wide area network (WAN)
  • The world’s largest network
  • A worldwide collection of networks that links together millions of computers by means of:
    • Modems
    • Telephone lines
    • Cables
    • Other communications devices and media
  • The internet allows 360 million people around the world to share information and ideas through:
    • Web pages
    • Newsgroups
    • Mailing lists
    • Chat rooms
    • E-mail
    • Electronic files
internet service provider isp
Internet Service Provider (ISP)
  • An internet service provider (ISP) is an organization that supplies connections to the internet for a monthly fee
  • Connecting to the internet requires special hardware and software and an internet service provider (ISP)
on line service
On-line Service
  • A business that provides its subscribers with a wide variety of data transmitted over telecommunicationslines.
    • Connect to 3rd party information providers
    • E-mail capabilities
world wide web www
World Wide Web (WWW)
  • The World Wide Web is a system of computers that share information by means of hypertext links on “pages”.
  • To identify hypertext documents, the Web uses addresses called Uniform Resource Locators (URL’s). example:
web page
Web Page
  • A document on the World Wide Web. Every Web page is identified by a unique:
    • URL (Uniform Resource Locator).
web site
Web Site
  • A site (location) on the World Wide Web. Each Web site contains
    • a home page, which is the first documentusers see when they enter the site.
web browser
Web Browser
  • To view hypertext documents on the Web, you need special software.
  • A Web browser is software used to display Web pages on your computer monitor.
  • Example : Microsoft Explorer
the end
The End
  • Any Questions?