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Basic Computer Concepts

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Basic Computer Concepts Hardware obeys instructions given by Software Input Memory - Processor - Storage - Output Video: Computer Basics from GCFLearnFree.org * – PowerPoint PPT presentation

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Title: Basic Computer Concepts


1
Basic Computer Concepts
Hardware obeys instructions given by
Software Input Memory - Processor - Storage -
Output Video Computer Basics from
GCFLearnFree.org

2
History of Computers
Charles Babbage - 1791 - 1871 Analytical
Difference Engines Herman Hollerith - 1860 -
1929 Punched Cards - 1890 Census Eckert
(1919-1995) Mauchley (1907-1980)
Eniac - 1945 - U of PA, Led to 1st
Computer Co Univac

3
Types of Computers
  • Desktop Microcomputers
  • Laptops (notebooks), Ultra thin Laptops
  • Tablets, iPad, Netbooks, Smart phones
  • Servers, Mainframes, Supercomputers
  • Newer - Light weight, touch, sound
  • Apple Macbook Air (2008)
  • Windows Ultra Books (2011)


4
BITS AND BYTES Capacity
  • Character A letter, numeral, punctuation symbol.
    Usually corresponds to a byte.
  • Byte A character, group of eight bits
  • Bit Smallest unit of information in a computer
  • is a bit, (binary digit). Can be 0 or 1.
  • ASCII A coding system for characters. a is
  • 61 hex, 97 dec, 97 html, 01100001 binary

Look terms up in webopedia.com

5
ASCII Coding
  • 01001000 01000101 01001100 01001100
    01001111
  • H E L L
    O
  • 072 069 076
    076 079
  • Can you spell your name in Binary or in Ascii
    code?
  • (See Ascii info at Webopedia.com)


6
Capacity - Kb, Mb, or Gb?
  • KB kilobyte - 1024 bytes
  • (about a thousand bytes - 2 10
  • MB megabyte - over 1 million bytes
  • (1024 times 1024, or 2 20 )
  • GB gigabyte - over 1 billion bytes
  • (1024 x 1024 x 1024 or 2 30 )
  • TB terabyte - over 1 trillion bytes
  • (1024 x 1024 x 1024 x 1024 or 2 40 )

Look at Bits and Bytes in HowStuffWorks.com

7
The System Unit / CPU Box
Integrated Mobile CPU
Dell Tower unit
Laptop / Notebook
  • Processor, Memory, Storage (hard drive or solid
    state device), ports
  • Companies IBM, Apple, Toshiba, Dell, HP

Look at Reviews on Cnet.com

8
The Motherboard or Main Board
  • CPU /processor
  • Bus
  • Ports in back
  • Power Supply
  • Memory (RAM,ROM)
  • Bays for storage devices (front)
  • Expansion Slots / Adapter Cards

Back
Front

9
The Processor
  • AMD Phenom, Athlon, FX,
  • A-series (A10, A8, and A6)
  • Intel - Pentium, Celeron, Core 2,
  • Core (I3, I5, I7)
  • Speed in Gigahertz (Ghz)
  • or Megahertz (Mhz)
  • PC World on Intel Processors


10
Memory and Storage
  • Memory - Temporary
  • - RAM (Random Access Memory)
  • Terms SDRAM Synchronous Dynamic RAM
  • DDR Double Data Rate (about 1600-3200 mbps)
  • DDR2 3200-8533 mbps, DDR3 6400-17066 mbps
  • ROM (Read Only Memory)
  • Cache - L1 and L2 - supports the CPU
  • Storage - Permanent
  • - Hard Drive or new Solid State Device


11
Computer Ports Plug things in
  • Legacy ports -
  • PS2 -mouse, keybrd
  • Serial(115 kbps)
  • Parallel(Printer,500k)
  • Current ports -
  • USB1-2-3 -(12/480mbps,10gbps) printer, mouse,
    flashdrive
  • Ethernet (RJ45 - 10/100/1000 mbps) network, NIC
  • Sound - speakers, microphone
  • Monitor SVGA, DVI, DisplayPort, HDMI


12
Output - The Monitor
  • Viewsonic 19 CRT

ASUS 20 LCD 109
  • Buying Guide
  • CNET.COM

Typical diagonal measures 17 and
up Resolutions (SVGA 43) 800x600, 1024x768,
1280x1024 New Resolutions (WXGA,169) 1600 x
900 Features Dot Pitch - distance between dots

13
Output - Printers(Impact, NonImpact, Inkjet,
Laser, All-in-one)
  • InkJet(120) All-In-One (130)
    LaserJet(330)
  • HP Deskjet 6122 Canon Pixma MG6320
    HP LaserJet Pro 200
  • (Amazon) (Staples)
    (Office Depot)
  • 15 ipm bw, 10 color
  • USB wireless
  • fax not available
  • print-copy-scan
  • 20 ppm bw
  • 3 ppm color
  • Parallel,USB
  • 14 ppm bw, color
  • USB ethernet
  • Wireless
  • 600 dpi color

Lookup Ink Jet Printer in HowStuffWorks.com
(Or Cnet.com)

14
Other Considerations
Mouse, Keyboards wired wireless CD/DVD
storage Webcam, scanner Surge Protectors UPS
Power Backup units Connection to Television

15
Resources
  • Lookup Information
  • webopedia.com wikipedia.com
  • howstuffworks.com cnet.com
  • Web Sales
  • academicsuperstore.com officedepot.com
  • bestbuy.com staples.com
  • Media
  • Microsoft Entertainment
  • Apple TV

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