Computer is an electronic device that manipulates information, or
“data.” It has the ability to store, retrieve, and process data. You can
use a computer to type documents, send email, and browse the internet.
You can also use it to handle spreadsheets, accounting, database
management, presentations, games, and more.
The computer is no longer a novelty today. It is something that is
highly functional and useful not only to scientists, managers,
businessmen, professionals, and government officials, but also to
students like you.
The world is changing because of the computer. The computer can do
almost any routine or systematic procedure or operation involving
information, so that people can have more time to do what they do best –
The term computer has many definitions. The easiest to understand and
remember is: A computer is an electronic device designed to manipulate
data so that useful information can be generated. Data may be defined as
any collection of facts. By this definition, data may refer to both
numerical and non-numerical information. Data processing is the
manipulation of data into a more useful form. It involves the
collection, processing, and distribution of facts and figures to achieve
a desired result. It may also involve the classification of data and
the transmission of data from one place to another. All the operations
involved in data processing may have been performed by some kind of a
machine or a computer, although some of them could have been carried out
manually. Data processing system refers to the equipment or devices as
well as procedures by which the result is achieved. In short, a computer
is part of a data processing system.
A computer accepts information (in the form of digitalized data) and
manipulates it for some result based on a program or sequence of
instructions on how the data is to be processed. Complex computers also
include the means for storing data (including the program, which is also
a form of data) for some necessary duration. A program may be
invariable and built into the computer (and called logic circuitry as it
is on microprocessors) or different programs may be provided to the
computer (loaded into its storage and then started by an administrator
or user). Today’s computers have both kinds of programming.
What are the Different Types of Computers?
When most people hear the word “computer” they think of a personal
computer such as a desktop or laptop computer. However, computers come
in many shapes and sizes, and they perform many different functions in
our daily lives. When you withdraw cash from an ATM, scan groceries at
the store, or use a calculator, you’re using a type of computer.
Many people use desktop computers at work, home, school, or the library.
They can be small, medium, or large in style, and usually sit on a
desk. Once you add a monitor, mouse, and a keyboard, you have what is
typically known as a desktop computer.