Types of Computers

1
Types of Computers

• Desktop / Laptop
• PC / Mac
• Client / Server

2
Desktop v. Laptop

• Desktop
• Keyboard
• CPU
• Disk drives
• Monitor
• Laptop
• Single portable unit with battery

3
Client / Server

• A server is a computer that is running software
  enabling it to serve specific requests from other
  computers, called clients.

4
Main Components

• CPU Central Processing Unit
• Memory
• Motherboard
• Hard Drive
• Operating System
• Sound Card
• Graphics Card

5
ROM

• Read Only Memory
• computer memory on which data has been
  prerecorded. Once data has been written onto a
  ROM chip, it cannot be removed and can only be
  read.
• -Webopedia

6
GUI

• Graphical User Interface
• Icon-based command system

7
Mouse

• A device that controls the movement of the
  cursor or pointer on a display screen
• -Tyson. How PCs work.

8
Input/Output Devices

• Monitor
• Keyboard
• Mouse
• Storage Devices (floppy, CD, flash, DVD)
• Ports (USB)
• Speaker
• Microphone
• Camera

9
Hard disk

• This is large-capacity permanent storage used to
  hold information such as programs and documents.
  
• -Tyson. How PCs Work.

10
Sound Card

• This is used by the computer to record and play
  audio by converting analog sound into digital
  information and back again.
• -Tyson. How PCs work.

11
Scanner

• A device that reads data and inputs it to the
  computer
• -Wilson.

12
Ports

• Slots or spaces on the outside of a computer to
  attach external devices such as printers,
  scanners, tape backup drives, removable CD-ROM or
  floppy-disk drives.
• -Wilson.
• Ethernet
• USB
• Serial

13
LAN

• Local Area Network
• Network covering a small geographic area

14
Binary

• Computers think in binary code
• All data is represented in 0s and 1s. This means
  every character (textual or numeric) must be
  converted to binary code to be processed by a
  computer.
• Additional reading
• http//theproblemsite.com/codes/binary.asp

15
ASCII

• American Standard Code for Information
  Interchange
• Additional reading for next week
• http//webopedia.com/TERM/A/ASCII.html

16
Networking Basics

• A network is a group of 2 or more computer
  systems linked together
• LAN
• WAN
• http//webopedia.com/TERM/n/network.html
• Additional reading
• http//webjunction.org/do/DisplayContent?id929

17
Computers in Libraries

• Staff
• Public

18
Troubleshooting

• A single workstation produces an error message as
  soon as it is turned on, at the beginning of boot
  up. Could it be
• Workstation CPU
• Workstation hard disk
• Workstation monitor
• Hub
• Server

19
Troubleshooting

• A single workstation sounds like it is booting
  up, but the screen remains blank. Could it be
• Workstation CPU
• Workstation disk storage
• Workstation monitor
• Hub
• Server

20
The Internet

• Global computer network made up of smaller
  networks using common protocols

21
intranet

• Web site internal to an organization, limited to
  local access and contained within a firewall.

22
Bandwidth

• Width of the pipe. The amount of data that can
  be sent at once.

23
Firewall

• Software that blocks access and protects a
  network or PC