1. Fill in the blanks on your note.
Computer Hardware
Fill in the blanks on your note.

2. Hardware
Hardware refers to the physical components of the computer system.
These physical components are hard, tangible objects.

3. Parts of the computer Monitor Modem System Unit Mouse Speaker Printer
Keyboard

4. The Central Processing Unit
CPU
Control Unit
Arithmetic Logic Unit
Input
Output
Random Access Memory (RAM)
Read Only Memory (ROM)
Main Memory
Secondary Memory (peripheral)
Memory stick CD
External Hard drive

5. Input Devices Mouse Keyboard Joystick Touch screen Other computers
Scanner
Camera
Light pen

6. Output Devices Screen Printer Sound
Modem: neither input nor output. It is a communication device.

7. Hardware Notes Input: A device that feeds information into the CPU
Output:
It displays information from the CPU

8. Central Processing Unit
This is the computer and it consists of three parts.
Control Unit: coordinates all processing activity (how and when to process data)
Arithmetic Logic Unit: performs the mathematical calculations and performs simple logic (compares 2 pieces of information and determines equality
Main Memory: where all the data and instructions are stored while the computer is turned on

9. 2 types of Main Memory Read Only Memory (ROM)
Data stored here can be looked at but not changed in any way. It is write protected. ROM often contains software programs built in by the manufacturer
Random Access Memory (RAM)
It is temporary storage only. When you turn your computer of, all data in RAM is deleted. Ram is where programs that you want to use are downloaded to (including internet files). Therefore RAM plays an important part in how fast your programs will run. EG. A copy of Microsoft Word is downloaded from a secondary storage device, such as your hard drive, to RAM when you want to create a word pro document.

10. Secondary / auxiliary storage:
Stores information permanently;
Acts as an input and output device
Examples:
Hard drive … may be external
Memory sticks or flash drives
Compact Disks (CD) … floppy disk???
Cloud / Google drive / Dropbox

11. Types of printers
Dot matrix: used only in industry for printing multiple copy forms; very poor quality, slow, noisy and very inexpensive
Ink jet: most popular for everyday use; good quality; considerably slower than a laser printer; relatively inexpensive
Disadvantage: when one colour runs out (even is others are still full, ink cartridge must be replaced and the ink can dry up if not used regularly

12. Types of printers (cont’d)
Plotters: a specialty printer that uses a series of ink pens to create large maps, charts, and graphs
Laser printers: very fast; images are precise; costs continue to drop; toner cartridges are expensive to replace

13. What is a …?
Modem:
allows computers to exchange information using telephone lines or cable (translator)
It is needed for internet access, and faxing
What is a Router?

14. What is a …? Continued Scanner
A device that can read images into a computer
It can scan images and text into a document that can be edited by a program
Sound Card:
Allows a computer to play and record high quality sound
Speakers are required to hear the sound

15. What is a …? Continued Port
A connection on the computer where you plug in external devices such as the mouse or memory sticks
USB Port = Universal Serial Bus
Digital camera:
Takes photos and then use them on your computer
Can place photos in documents, web-pages, s, etc.

16. The End!