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1. COMPUTER
Presenters:
Md.Rakib Hasan
Aiub student

2. OUTLINE
1.Introduction
2. Classification of Computer
3. Hardware
4. Software
5. Input Devices
6. Output Devices
7. Usage of Computer
8. conclusion

3. Introduction
The computer is the latest & the most excellent miracle of modern science.
We now live in a computer age; the computer has become our friend,
philosopher, and guide.computers are basically the electronic devices that are
used to store and manipulate information that is recoverable and can be
stored for long-term use The word computer is derived from the verb
‘Compute’ meaning to reckon or calculate something.

4. CLASSIFICATION OF COMPUTER
Computer is classified into several categories
depending on their computing ability and
processing speed. These include
1.Microcomputer
2.Minicomputer
3.Mainframe Computer
4.Supercomputer

5. MICROCOMPUTER
The term microcomputer is generally synonymous with
personal computer, or a computer that depends on a
microprocessor. Microcomputers are designed to be used
by individuals, whether in the form of PCs, workstations or
notebook computers. A microcomputer contains a CPU on
a microchip, a memory system (typically ROM and RAM), a
bus system and I/O ports, typically housed in a
motherboard.

6. MINICOMPUTER
A minicomputer is a medium-sized computer that is
more powerful than the microcomputer. An
important distinction between the microcomputer
and a minicomputer is that a minicomputer is
usually design to serve multiple users
simultaneously. A system that support multiple
users is called a multiterminal, time-sharing system.
Minicomputer are the popular computing systems
among research and business organizations today.
They are move expensive than microcomputer.

7. MAINFRAME COMPUTER
Mainframe computer are those computer,
which help in handling the information
processing of various organization like banks,
insurance companies, hospitals and railways.
Mainframe computer placed on a central
location and are connected to several user
terminals, which can act as access stations
and may be located in a same building.
Mainframe computer is larger and expensive
in comparison to other workstations.

8. SUPER COMPUTER
Supercomputer are the most powerful
and expensive computers available.
Supercomputers are primarily used for
complex scientific application, which need
a higher level of processing. Some of
these application include weather
forecasting, climate research, molecular
modeling used for chemical compounds,
aeroplane simulation and nuclear fusion
research.

9. HARDWARE
The electronic device is known as hardware.
Computer Hardware is the physical part of the
computer system, the machinery and
equipment. Parts of the computer “you can
feel” Internal hardware devices include
motherboards, hard drives, and RAM. External
hardware devices include monitors, keyboards,
mice, printers, and scanners. The internal
hardware parts of a computer are often
referred to as components, while external
hardware devices are usually called
peripherals. Together, they all fall under the
category of computer hardware.

10. SOFTWARE
Software is a collection of computer programs and related data that provide
the instructions for telling a computer what to do and how to do it. In other
words, software is a conceptual entity which is a set of computer programs,
procedures, and associated documentation concerned with the operation of
a data processing system. We can also say software refers to one or more
computer programs and data held in the storage of the computer for some
purposes

11. INPUT DEVICES
Input device captures information and translates it into a form that can be processed and used
by other parts of your computer.

13. USAGE OF COMPUTER
• Computer is the best companion of our daily life
Computers are found in almost all fields i.e., education, healthcare,
business, homes among other fields. The uses of computers cut across all
fields for the basic functions and then differences in function are specific to
fields. Computers are used to enter information and store them. Specific
tasks are also performed using computers for example monitoring of
performance or office work. Computers are also used for entertainment like
computer games, watching and listening to music. Computers are used to
access information from the internet and it enables learning and
communication.

14. Advantages of Using Computers
• Computers enable quick and efficient storage and
processing of information. The simplification of work and
efficiency is enabled by computers. In healthcare for
example, patient’s data and information is entered into a
computer instead of using the old methods of pen and
paper therefore, time is save and accuracy is enhanced.
• Computers enable digitalization of things like photos,
documents and books. This makes the learners to have less
baggage when carrying their reading material because they
have been digitalized. Digitalization also saves time because
when one is in need of a photo or a document, it is easier to
get a digitalized one than a manual one.

15. Conclusion
• Based on the shred knowledge on
computers, it is evident that its use has
diversified globally. The use has increased
efficiency and it has improved almost all
sectors of life ranging from the social,
economic, cultural and political. The use of
computers has its pros and cons. Computers
are actually essential because they
complement human abilities and they will go
a long way in improving the way of life.