1. Info Tech for Medical Profession
Unit 2- Computer Hardware

2. Objectives Identify system components
Describe the role of the central processing unit
Define computer memory
Identify types of storage devices
Care for storage media
Pass out an advertisement to identify specifications as we go through the unit.

3. Case Box that contains components Tower case All-in-one
What kind of case is in the ad?

4. Monitor Displays the images LCD- thin LED- very thin CRT (old)
Very bulky
Measured diagonally
13”, 15”, 17”, etc.
What kind of monitor is in the ad?
LED uses less energy.

5. Inside the Computer
Will you have to go in the computer? Probably not. But you should know about the most important components so you can buy a good computer.

6. Motherboard Circuit board Connects all components
CPU
Memory
Hard drive
Bus on bottom of motherboard
Path to transfer data to components

7. How fast is your computer?- CPU
Central Processing Unit
Processor or “Brain”
How fast it processes instructions
Intel, AMD brands
Speed measured in Gigahertz (GHz)
2.2Ghz, 3GHz
Speed of CPU is not the most important
CPUs are pretty equal today
Millions or billions of instructions per second
Find the CPU brand and speed of a laptop/desktop in your ad.

8. How much memory ?- RAM Random Access Memory
Active programs/data are held here when running
Stores what you are creating
“Short-term memory”
Disappears when computer is off
Measured in Gigabytes (GB)
8GB is standard now
Explain: Typing up a paper and you copy a picture from the Internet. It puts it in temporary memory (RAM). If you copy a picture and shut the computer off, the next time you turn your computer on, you won’t be able to paste the picture. Stuff in RAM goes away with no power.
More RAM= the more things you can do at the same time. (Multitasking)
Not enough RAM, slows down!
How much RAM is in the computer in your ad?

9. What Do You Have? In Search, type System or About My PC
MAC Instructions: Go to the Apple menu and choose About This Mac.
Demo this on the classroom computers.
Demo how to snip & Print Screen.

10. Project Create a PowerPoint about your Laptop or Desktop
Slide 1- Title Slide
Picture of your device & your name
Slide 2- Monitor or Screen
Have your name or pic on screen
Size of screen & type (LCD/LED or CRT)
Slide 3- System Info
Screenshot of info
List brand & speed of CPU
List amount of RAM

11. How does your computer boot?- ROM
Read Only Memory
Chip on motherboard with software BIOS
Has instructions to boot your computer
Read only- no store data
Tells where OS is stored (HD)
Info stays when power is off

12. Boot Process Power on the PC ROM/BIOS checks for location of OS
Usually on the hard drive
Loads OS from hard drive into RAM
OS Starts
You log in

13. Review- 3Q What speed is a CPU measured in?
GHz
Which memory holds your active, running programs or what you copied?
RAM
Which type of monitor is shown?
CRT

14. Review- 4Q Which memory goes away when power is off?
RAM
What holds the computer’s boot instructions?
ROM/BIOS
What is the brains of a computer?
CPU- what does it stand for?
The CPU, RAM, and ROM all connect to what component?
Motherboard

15. Storage Device- Hard Drive
Store data permanently
Long-term storage
GB or TB
500GB
1TB
Inside Case or External
External connects to USB port
Open Word- Word is stored on the hard drive. When you open it, it goes from HD to RAM to run.
About 250,000 mp3 songs can fit on a 1TB hard drive.
What size HD is on the computer in your ad?

16. Storage Device- Optical
Optical uses a laser to read/write data
CD or DVD-ROM= Read Only
CD or DVD-/+R= Record Once
CD or DVD-/+RW= Rewritable
BD-R= Blu-ray Record Once
CD= 80 min./ 700MB
DVD= 2 hrs./ 4.7GB
BD= 4.5 hrs. of HD/ 25GB

17. How much can it hold? CD (700MB) DVD (4.7GB or about 4700MB)
Photos & MP3 songs are about 3MB each
How many can fit on a CD-R?
DVD (4.7GB or about 4700MB)
An average 90min movie is about 900MB
How many movies will fit on a DVD-R?
BD (25GB or about 25,000MB)
How many photos can fit on a BD-R?
CD-R holds about 233 photos.
DVD-R holds about 1567 photos.
DVD-R holds about 5 90min DVD quality movies.
BD-R holds about 8333 photos.

18. What Do You Have? Size of Hard Drive & Type of Optical Drive:
Click “This PC”
Logos on/next to optical drive

19. Storage Device- Flash No moving parts Memory Cards Flash drives
SD/SDHC, microSD, CF, Memory Stick
Laptops, Tablets, Phones usually have slots
Flash drives
In Tablets & Phones
Handout with flash memory cards to ID.

20. Project The PowerPoint with your device Slide 4- Hard Drive
Screenshot of HD space from This PC
List how big the HD is
Slide 5- Optical Drive
Picture of the drive/cover & This PC showing type
List if it takes CD, DVD, BD and if it records anything
Slide 6- Flash Storage
Picture of laptop/tablet/phone card storage or flash drive
Picture of the card or drive
List the size & type of card or drive

21. Storage Device- SSD In very thin laptops No moving parts inside
Faster & smaller
HDD cheaper right now & comes in larger size
What kind of HD is in the ad?

22. Storage Device- Floppy Disks
8-inch ¼” ½”
3.5” Disk only held 1.44MB (Megabytes)
Most photos are about 3MB!

23. Computer Specifications Poster
Each group of 2 will be assigned a device
Look up specifications
Fill in a poster with the correct specs
Include a picture of the device

24. Review- 3Q
T/F. Hard drives are used to temporarily store what you are creating.
False
Which removable storage would you use to copy pictures from one PC to another? Flash Drive, Memory Card, Floppy, or Ext. HD
Flash, Mem Card, or Ext HD
Which optical storage would be used to store music and then later erased to store photos?
CD-RW

25. Review- 3Q How much data can a Blu-Ray DVD hold?
25GB
If pictures are about 3MB each, how many pictures could you put on that disc?
About 8300!
Which storage device has no moveable parts?
SSD/Flash

26. Info Tech for Medical Profession
Unit 2- Computer Hardware