4. A computer is an electronic
device, operating under the
control of instructions
(software) stored in its own
memory unit, that can accept
data (input), manipulate data
(process), and produce
information (output) from the
processing. Generally, the
term is used to describe a
collection of devices that
function together as a system.
5. An input device is any device that provides input to a computer.
A mouse is a type of input device. By sliding the mouse along the desk
surface, the user can move objects on the screen, draw pictures, and select actions to be
performed by pressing one or more buttons.
Keyboard is the most popular input device that allows users to type
alphabets, numbers, and operators, and also to control the cursor on the screen.
: An alternative to the traditional mouse and often used by graphic
designers.
Another type of hardware that can be used for inputting information
is called a joystick. It is much easier to play some games with a joystick than with
keyboard keys. If you plan to play a lot of games, you may wish to get a joystick.
6. electronic or electromechanical equipment connected to a computer and used to transfer
data out of the computer in the form of text, images, sounds, or other media
Monitor, which again is a very essential part of the computer
system, displays the actions that the computer performs on our command.
The printer is used for putting documents on paper.
Plotters are expensive output devices specially designed to produce
outputs of diagrams, illustrations and other graphics.
Speakers are also included in basic elements of a computer. It is not
indispensible, because a computer can perform its function without speakers. However, we
use them to for multiple purposes.
7. In general, no human being can compete to solving the
complex computation, faster than computer.
Since Computer is programmed, so what ever input
we give it gives result with accurately.
Computer can store mass storage of data with
appropriate format.
Computer can work for hours without any break
and creating error.
We can use computer to perform completely
different type of work at the same time.
It can remember data for us.
8. 1. Computers in Business: They are used in keeping records of daily sales and profits. Computers
are also used to prepare materials to promote the products of the business establishments.
2. Computers in Engineering: Engineers use computers to create the design of a complex object
using a computer program for Computer-Aided Drafting.
3. Computers in the Government: Computers are used to keep records of the people that the
government serves. Several government agencies use computers to facilitate the task they are required to
give to the people.
4. Computers at Home: Computers are used at home for recreational purposes. You can listen to
music, watch movies and play games.
5. Computers in Manufacturing: Computers are used in manufacturing to manipulate machine
that perform dangerous tasks or tasks that are repeatedly done.
6
. Computers in School :Students use computers to study various computer applications.
7. Computers in Science: Computers are used in science to stimulate experiments, which are
dangerous to perform in real life. Computers are also used to record data and information derived from
experiments.
9. 1. No Self Intelligence:
Computer does not have any intelligence of its own. It works according to
the instruction only.
2. No Decision-Making power:
Computer cannot take any decision of its own. It does only those tasks
which are already instructed to it.
3.No learning power:
Computer has no learning power. Once you give instructions to a computer
how to perform a task, the very task is cannot perform if you do not give it
any instructions for the next time
4.Self Care:
A Computer can not care itself like a human. A computer is dependent still
to human beings for this purpose.
5. No Feelings:
Computer doesn’t have feelings like human.
