1. Chapter 1 Introduction to Computers
Maran Illustrated Computers
CIS 102

2. Introduction to Computers Do you want to learn more about your computer? This chapter is the place to start.
Hardware
Software
Getting Help
How Computers Work
Bytes
A Typical Computer
Inside a Computer
Computer Case
Power Supply
Ports
Expansion Card
Purchase a New Computer
Upgrade a Computer
Ergonomics
Biometrics

3. Hardware Hardware is something you can feel
The case, tower, monitor, keyboard, mouse, printers are all Hardware.

4. Software Software interacts with the Hardware telling it what to do.
Computer Systems today are shipped with the latest OS which is Vista.

5. Getting Help
Getting help can be found in the original documentation, manufacturer’s website
Ask the person you bought it from, store clerk or local computer store when help is needed
Free classes can be found at most local libraries while regular schools with adult education and colleges offer classes for a fee.

6. How Computers Work In General
You input information or communicate from a scanner, keyboard, mouse, microphone and joystick; These are all input devices
The CPU communicates with input, outputs and storage devices to perform the tasks.
A storage device stores information
An output device such as a monitor, printer, and speakers generally give you something like sound, creates printed copies and a visual information on a screen.

7. Input Devices Keyboard, mouse and Joystick
A keyboard, mouse and joystick are common input devices

8. Output Devices Monitor, Speakers and Printers are all output devices
A monitor puts out a visual display, a speaker puts out sound and a printer puts out a printed copy.

9. CPU Central Processing Unit
The Central Processing Unit commonly known as the CPU is the main chip in a computer it processes instructions, performs calculations and manages the flow of information.

10. Storage
Hard Drive, Recordable DVD, Flash Drive and MP3 players all store information.
Hard Drives, Flash Drives, MP3 Players, DVD, DVD-RW are all forms of storage and very popular.

11. Bytes

12. Types of Computers

13. PC (Personal Computer)
A PC- Personal Computer is common place in the home today. It is an extremely valuable researching tool and connects to the World Wide Web

14. Macintosh

15. Handheld

16. Laptop

17. A Typical Computer

18. Speakers, Monitor, Tower, keyboard, Printer and Mouse
Monitor, keyboard, mouse are input devices.
Speakers and printer are output devices.
The tower is considered Hardware

19. Inside a Computer (A)
Expansion Card
Expansion Slot
Motherboard

20. Inside a computer(B)
RAM
CPU

21. Computer Case
Tower Case
Desktop Case
Notebook
All-In-One Case

22. Tower Case Desktop Case
Tower cases come in different sizes. They can be set on top of the desk or underneath which allows for more desk space.
Desktop cases were once very popular but are no longer readily available. The monitor usually sat on top of it.

23. Notebook
A notebook computer is a small, lightweight computer that usually has a rechargeable battery and is easily transportable. It also has a built-in keyboard, pointing device speakers and screen.

24. Power Supply
A power supply changes the alternating current (AC) that comes from the outlet to the direct current (DC) that a computer can use.

25. Protect Your Equipment
Surge Protector

26. UPS Uninterruptible Power Supply UPS – uninterruptible power supply
Rated in volt/amps
Buy one that is roughly twice the wattage of your PC’s power supply
Most will run your PC for about 15 minutes when the wall power goes out.
Many have s/ware that will shut down your PC in an orderly manner in a power outage. You do, however, have to plug it in and install the s/ware.

27. Ports

28. Ports
Mouse Port – Green

29. Mouse Port

30. Keyboard Port

31. Parallel Port
Parallel Port - Pink

32. Monitor Port Ports Analog VGA 15-pin monitor input
Digital Visual Interface (DVI) digital monitor interface – better picture
Three versions – The one shown is DVI-I, analog and digital outputs
Back Mother board
Keyboard – pink
Mouse – green
Parallel printer port – pink
Serial port – communications - green
Monitor - blue 32 32

33. Sound Ports Standard audio interface microphone input earphone input
line-out (Powered Speakers) 33 33

34. Modem port Phone Jack (RJ-11) Send/Receive fax Modem Regular phone 34

35. Ethernet (Network) Port
Network and Broadband connector (RJ-45)
Look at back of computer
Notice the blinking lights (green and amber) 35 35

36. USB port USB Serial Port Start/Stop Technology similar to xon/xoff
Most peripherals attach through USB ports today
USB – Universal Serial Bus
USB up to 480 mbps (40 x 1.0) 36 36

37. Firewire port IEEE 1394 (Firewire) port Straight-thru pipe
Best input for video camera transfer to digital
Can attach USB devices like: mp3 players, jukebox, camcorder 37 37

38. Advantages of USB and Firewire Ports
Read the page notes.
Add-on USB or Firewire port about $30
Discuss:
- automatic configuration – plug and play
- multiple devices – up to 127 devices daisy chained on a port
Discuss that some devices required a powered hub to support some multiple devices. 38

39. Daisy chaining
Daisy chaining 39 39

40. Plug and Play Camcorder to PC connection
Discuss plug and play – automatic configuration 40

41. Adding ports to your computer
Firewire port is about $30
Adding USB and/or Firewire ports 41 41

42. Expansion Card Read the notes Examples: Sounds card Video card Etc. 42

43. Expansion Slots
Note the expansion card is being inserted into an expansion slot on the mother board. 43 43

44. Connect Devices Rear shot shows ATX case type
Note the camcorder is being connected to the expansion board by a cable. 44 44

45. High-End Video High-end video cards Games Graphic-intensive software45 45

46. Firewire or USB 2.0
Camcorder again 46 46

47. High-End Sound High-end sound Wave-table synthesis (Sampled sounds) 47

48. Network Interface Card (NIC)
Networking 48 48

49. Purchase a New Computer
Store Purchase
On-line Purchase
Build-your-own
Dfn. Intended use
Dfn. S/W needs
Therefore defines H/W 49

50. Upgrade a Computer
Main upgrades today are RAM (memory) and external Hard Disk Drives
Major upgrades may be better served by buying a new PC
Vista – minimum 1GB memory, better 2 GB
Add-ons like DVD, HD video etc.
Upgrade $$ vs. Purchase cost Need to weigh

51. Ergonomics Repetitive Strain Injuries Reduce glare
When working on a computer, improper positing can cause shoulder, neck, back, elbow and wrist pain as well as headaches and eyestrain 51

52. Suggested Sitting Position
Now, try to work this way. 52

53. Biometrics Read the notes: Biometric traits - review the list above
Common measures
- finger prints
- facial features
- retina or iris
- finger or hand geometrics
- voice 53

54. Biometric Devices Read the notes:
Portable devices often use biometrics, to prevent access by unauthorized person
Password – as long as possible and include letters, numbers and special characters. Change regularly, don’t write down
Disadvantages:
- a person you want to share access with can’t access with out the proper biometrics, thus difficult to share 54