Name : Rowshanara ID: 1834902165

1. Assignment
On
How does a computer device work
Course code : CSE – 313
Course name : Data communication
Submitted to
Pronab Bandhu Nath
Senior Lecturer
Department of CSE
City university
Submitted by
Name : Rowshanara
ID : 1834902165
Batch : 49th
(B)
Department of CSE
Submission date : 22/08/2021

2. What is computer?
The word “compute “ comes from “compute “ means “to
calculate” and computer means calculating machine.
Computer is an auomatic device that process data according
to a set of stored instruction.Can't think but carry out
instruction 0 and 1.
Types of computer :
1.Micro computer
2. Mini computer
3.Personal computer
4. Laptop
5. Super computer

3. 6.Tablet
Working principle of computer :

4. COMPUTER INPUT DEVICES
Computer Input is the collection of raw data/facts; hence translating into image,
word, sound, and action that people understand into a form that the System Unit
can understand and process. (e.g. using a form on the website to collect visitor’s
opinions, collecting facts about a research project, typing, and processing using the
computer keyboard or mouse). Computer input can simply be defined as the
information entered into a computer system including typed text, mouse clicks,
etc.
Computer Input devices are those responsible for the insertion of data into the
computer, that is instructing the computer. They are devices that enter information
into a computer from an external source. Data is referred to as the “raw material”
for information at a particular time.
Computer input devices:
Examples include; keyboard, mouse, joystick, Webcam, etc.

5. COMPUTER PROCESSING DEVICES (CPU)
Co
mputer Central Processing Unit CPU also called Processor
Computer Processing is the means by which computer programs and instructions
are being executed. It is actually the process of transforming input (data) into
output (information).
Computer Processing devices are those devices directly responsible for the
transformation of data into information. The processor is the main component in
the System unit capable of interpreting computer program instruction and
processes data. Another vital component for processing is the RAM; It receives
and temporarily stores data and program instruction to/from the CPU.
COMPUTER OUTPUT DEVICES
Computer Output refers to processed data called information. Output is the process
of transmitting the processing data into a form that makes sense to humans.
Computer Output devices are those use to display data that has been processed
either in hardware or software form to make sense to an individual or group of

6. persons. They are simply defined as any device used by a computer to
communicate information in a usable form. Information is referred to as the
result of processed data that makes sense in life.
computer
output devices
Examples include; printer, monitor, etc.
COMPUTER STORAGE DEVICES
Computer storage refers to the action of a computer that permits it to store data and
information, while computer storage devices refer to those devices responsible for
the storing of these data and information. A computer storage device is a
mechanical apparatus that has the ability to store data and also retrieve this data.
Those devices that store data for a long time are said to be permanent storage
devices while those that store data or information for a short time are referred to as
temporal storage devices.