This document discusses the different types of digital computers:
- Supercomputers are the most powerful and can process large amounts of data for complex problems. Examples include Cray computers.
- Mainframes are large, expensive computers used by large organizations for data storage and processing. Examples include IBM mainframes.
- Mini computers are smaller than mainframes but more powerful than PCs. They are used in businesses, education and government.
- Personal computers include desktops, notebooks, and servers. They were first introduced by IBM and are now made by many manufacturers.
- Mobile devices are small, portable computers like smartphones, tablets, and media players. They store data on memory cards.
- Embedded computers are very small
4. Developed in 1980’s by Cray.
Heavy , powerful , expensive.
Process large amount of data.
Store more than 20,000 times data than desktop
computers.
Solve complicated problems.
Thousands computers can be connected at same time.
Use in weather forecasting , aircraft designs , online
banking.
Examples:
CRAY-1,CRAY-2 etc.
5.
6. Introduced in 1975.
Large in size , can store large amount of
data/instructions information.
Has multiple processors and can process millions
of instructions per second.
They can be use in large organizations such as in
banks , in airlines for scheduling and reservation of
seats.
Special use in Network environment.
Examples:
IBM S/390,Control Data CYBER 176 etc.
7.
8. First introduced in mid of 1960’s.
Also known as midrange computers.
Small in size , costly than PCs , having multiple
processors.
Processing speed is less than mainframe but more
than PC.
Use in business , education , in Govt
Departments.
Mostly use as server in network environment.
Examples:
IBM AS/400 , IBM System 360,HP 3000 etc.
9. First designed by IBM in 1981 names as IBM-PC.
Also known as microcomputers.
small in size , less expensive , consist of processor
, input/output devices , storage devices
,communication devices.
“PC-compatible” refers to any personal computer
based on original IBM personal computer design.
PC and PC-compatible use Windows operating
system while Apple usually use Macintosh
operating system (Mac OS).
Companies making PCs Dell , HP , Toshiba.
11. Small in size , can fit in pocket or in one hand ,
internet enabled device.
Don’t have Disk Drives.
Stores information and programs permanently on
special storage media like Memory cards.
Can be connect to PC for exchange data.
Examples:
Handheld computers , PDAs (personal digital
assistant) , smart phones, portable media players ,
digital computers etc.
12.
13. Also called microcontroller.
Computing device , limited hardware , have circuit
board , control functions of device.
Use in many electronic devices like mobiles and
digital telephone , printers , DVD players , fax
machines , photocopy machines etc.
In medical equipment , washing machines ,
microwave oven.
Example:
Microcontroller in a printer monitors the functions
of printer.