3. Introduction
A computer is a machine that can be
programmed to automatically carry out
sequences of arithmetic or logical operations
(computation)
4. Classification on computer
Computer is classified into several categories
depending on their community ability and
processing speed.these include
1.Micro Computer
2.Mini Computer
3.Mainframe Computer
4.Super Computer
5. Micro Computer
A microcomputer is a complete computer on a
small scale, designed for use by one person at a
time. An antiquated term, a microcomputer is
now primarily called a personal computer, or a
device based on a single-chip microprocessor.
Common microcomputers include laptops and
desktops.
6. Mini Computer
Minicomputer, computer that was
smaller, less expensive, and less
powerful than a mainframe or
supercomputer but more expensive
and more powerful than a personal
computer. Minicomputers were
used for scientific and engineering
computations, business transaction
processing, file handling, and
7. Mainframe computer
A mainframe computer, informally called a mainframe or big iron,[1] is a
computer used primarily by large organizations for critical applications like
bulk data processing for tasks such as censuses, industry and consumer
statistics, enterprise resource planning, and large-scale transaction
processing. A mainframe computer is large but not as large as a
supercomputer and has more processing power than some other classes of
computers, such as minicomputers, servers, workstations, and personal
computers. Most large-scale computer-system architectures were
8. Super Computer
A supercomputer is a type of computer with a high
level of performance as compared to a general-
purpose computer. The performance of a
supercomputer is commonly measured in floating-
point operations per second (FLOPS) instead of million
instructions per second (MIPS). Since 2017,
9. Hardware
Computer hardware is a collective term used
to describe any of the physical components
of an analog or digital computer. The term
hardware distinguishes the tangible aspects
of a computing device from software, which
consists of written, machine-readable
instructions or programs that tell physical
components what to do and when to execute
the instructions.
10. Software
System software is software that directly operates the computer hardware
and provides the basic functionality to the users as well as to the other
software to operate smoothly. Or in other words, system software
basically controls a computer’s internal functioning and also controls
hardware devices such as monitors, printers, and storage devices, etc. It
is like an interface between hardware and user applications, it helps them
to communicate with each other because hardware understands machine
language(i.e. 1 or 0) whereas user applications are work in human-
readable languages like English, Hindi, German, etc. so system software
converts the human-readable language into machine language and vice
versa.
11. Input device’s
Input device captures information and translates it into a form
that can be processed and used by other parts of your
computer.
12. Output device’s
Output devices take information within your computer
and present it to you in a form that you can understand.
13. USAGE OF COMPUTER
Computer is the best companion of
our daily life
Network attached
storage
Media Server
Graphics design
On-line banking
Gaming
Social Networking
Knowledge sharing