A computer is an electronic machine that accepts data as input, processes that data, and produces information as output. It is composed of both hardware components like the CPU, memory, keyboards, and monitors, as well as software programs and instructions. Computers are powerful tools due to their speed, accuracy, large storage capacity, ability to automate tasks, versatility across many areas, and diligence in consistently performing tasks as programmed.

2. DEFINITION OF COMPUTER
 A computer is a man made electronic machine which stores, reads
and processes data to produce meaningful information as output. It
is made of English word ‘to compute’. A computer accepts data
from and input device and processes it into useful information
which it displays on its output devices.
 A computer is a collection of hardware and software components
that helps us to accomplish many different tasks. Computer cannot
works on their own. They do what we want them to do, only we give
them the right command. Its memory is better then human memory.

3. The common characteristics that makes computers of all sizes such a
powerful machine are speed, accuracy and reliability, storage,
automation etc.
 Speed- computer can calculate at very high speed.
 Storage – computers have their main memory and auxiliary memory
system. A computer can store a large amount of data.
 Automation – computers can be programmed to perform a series of
complex tasks, involving multiple programs. Computer will perform things
flawlessly.
 Versatility- the wide use of computers in so many areas such as
commerce, scientific applications, education in day to day life is ample
evidence of its versatility.
 Diligence- diligence means being constant and earnest in efforts and
application.

4. HARDWARE
 Hardware is the physical
aspect of computers. The
hardware are the parts of
computer itself including
the CPU, memory,
keyboards, monitor, drives
etc.
 And other parts called
peripheral components or
drives which include
printers, modems,
scanners etc.
SOFTWARE
 The set or series of
instruction called software.
It is the combination of
instruction and data, that
forms the building blocks of
applications such as word
processor, computer game
or spreadsheet.
 Software is divided into two
categories. System
software and application
software

5. SYSTEMSOFTWARE
 OPERATING SYSTEM
 TRANSLATOR
 DBMS
 UTILITY
 DATA
COMMUNICATION
SOFTWARE
APPLICATIONSOFTWARE
 MEDICAL SOFTWARE
 EDUCATION
SOFTWARE
 BUSINESS
SOFTWARE
 ENTERTAINMENT
SOFTWARE