it's useful for education

1. ComputerComputer
 Computer EssentialsComputer Essentials
 HardwareHardware

2. Comput erComput er
HardwareHardwareMemory
OutputInput Processor
Hard
disk
Flash memory
CD or DVD
Storage
Temporary Data Holding
Data Data
Data
Data
Data

3. Sof t wareSof t ware
Program TypesProgram Types System Software: all the programs that
help the computer function
operating system (OS)
- including user interface
 Application Software: all the programs
you can use to perform a task
productivity software
special-purpose programs

4. The PhysicalThe Physical
Component sComponent s Input devices
 Processing
 Output devices
 Storage devices
 Communications devices

5. I nputI nput
DevicesDevices Keyboard
 Mouse, Touch pad, Joystick
 Touch screen
 Digital Camera, Digital Video
 Microphone, Sound card
 Scanner
 Barcode Reader

6. Out putOut put
DevicesDevices Monitor, Video Adapter Card
 Printer, Laser or Inkjet
 Loudspeakers, Audio Output
 Tactile Feedback, Braille

7. Bit s and Byt esBit s and Byt es
 bit = binary digit
the basic unit of information
1 or 0
 byte = 8 bits
enough combinations (28
= 256)
to store essential characters

8. Ext ended ASCI IExt ended ASCI I
charact er codescharact er codes

9. But modern computers use
Unicode, which is a much
greater encoding system. It
allows for encoding of all
the languages in the world.

10. Big & Way BigBig & Way Big
Byt esByt es Byte a grouping of eight bits
for instance --> 0110 0001
 Kb (kilobyte) about 1000 bytes
 Mb (megabyte) about one thousand Kb
or one million bytes
 Gb (gigabyte) about one thousand Mb
or one billion bytes
 Tb (terabyte) is about one thousand Gb
or one trillion bytes

11. Port TypesPort Types
 Serial -bits flow in a single line
 Parallel -several bits flow at once
 SCSI - can connect up to 8 devices, fast
USB - data transfer, found on all Macs
 FireWire - can connect many devices, has
hot swapping capability
 IrDA - like USB, higher speed & more $ infrared,
line of sight

12. Mot herboardMot herboard Printed circuit board with connectors
slots for
adapter cards
slots for
RAM chips
ROM chip
CPU

13. Memory - RAMMemory - RAM
 Stores part of operating system
 Stores part of the application
programs
 Stores your files as you work on
them
“Never too rich, never too thin,
never too much RAM”

14. What kind of memory?What kind of memory?
Recommendation:
Get DDR memory. It will give
better performance because it
allows for 2 channels between
CPU and other parts.

15. Primary St orage –Primary St orage –
Hard diskHard disk Size in Gigabyt es
 Magnet ic
t echnology
 Fast access

16. Secondary St orage -Secondary St orage -
CD/ DVDCD/ DVD *-R - recordable burn once
 *-RW - rewritable
erase and burn again
 650 MB for a CD
 4.7 GB for a DVD
 8.5 GB for Dual Layer DVDs
 In-expensive

17. Flash memory – USBFlash memory – USB
st ickst ickFlash memory is a non-volatile computer memory
that can be electrically erased and reprogrammed.
It is a technology that is primarily used in memory
cards and USB flash drives for general storage and
transfer of data between computers and other
digital products.
Easy to use and fairly inexpensive.

18. Nost algic St orage -Nost algic St orage -
Floppy DisksFloppy Diskswrite protection tab
liner
disk
spindle hole
sector hole
plastic casing
sliding metal shutter
read/write opening

19. Then and NowThen and Now
1982 - ABC 80
Made in Sweden
2007 – Macbook
Pro
Made in China

20. Specif icat ionsSpecif icat ions
The ABC80
3 MHz CPU
16 kb memory
No hard disc
Two big floppies for
storage instead
Monochrome monitor

21. What ’s next ?What ’s next ?
“When man and machine merge”
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