THE FIVE
TYPES OF COMPUTERS
Day 6 Lesson Notes to be WRITTEN in YOUR JOURNAL:
 Companies/people pick a computer based on what they NEED to do.
 Price can be an issue since some of them are $100,000.
 If you get one that’s more powerful than you need, it’s a WASTE OF RESOURCES for a company.
 WHY would anyone or any computer ever spend more than $100 million dollars on a computer?
 What “special effects” have you seen in movies?
- Mainframe
and
-
first type of
computer used by government and businesses
-
multiple tasks
for many users simultaneously
-
Large
corporations
-
Climate
controlled rooms
-
Hook-up to it
through personal computer
-
Examples –
government agencies accessing social security numbers/info
-
National car
rental company access info on anytime/where you have ever rented a car
-
Credit card
companies’ customer service
- Supercomputer AND
-
Processes
trillions of calculations per second
-
Weather
forecasting
-
Crash testing
-
Special effects
in movies
-
$100 million
-
Why do people
spend this much on a computer? - save
lives or will make more than it cost
- Minicomputers
AND
-
Popular in the
70’s and 80’s
-
Small to medium
size companies
-
Schools and small
office companies (less than 100 people)
-
Less than
$100,000
-
Now that PCs are so
powerful, these are becoming OBSOLETE
- Professional
Workstation and
-
Need more power
than a pc
-
Rapid processing
and relatively low cost
-
Scientist,
graphics, financial analyst, architects
-
$2000-$9000
-
Now that PCs are
so powerful, these are becoming less necessary
- Personal
Computers and
-
Exploded in the
early 80’s
-
Cost is always
decreasing
-
Use to have a lot
of “types” – now Apple and IBM – compatible (Apple good for media)
-
Rapid processing
and relatively low cost
-
Scientist,
graphics, financial analyst, architects
-
$2000-$9000