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• Digital: It refers to a computer that uses digits (binary numbers 0’s and 1’s) to
generate, process, and display data. The results produced by digital computers
are more accurate than those of analog computers. All the modern computers
that we currently use, like desktops, laptops, and smartphones, are examples
of digital computers. Some other examples of digital computers are digital
watch, digital thermometer, electricity meter, etc.
A Digital Computer
• Hybrid: It refers to a computer that provides the functionality of both,
an analog and a digital computer while processing and displaying
data. It uses the speed of an analog computer and the accuracy of
a digital computer. These types of computers are generally used
in scientific research and specialised applications. The heartbeat
measuring machine used in hospitals is the most common example
of a hybrid computer. A Hybrid Computer
Purpose
On the basis of their purpose, computers can be of two types:
• General Purpose Computer: It refers to a computer that can perform different kinds of jobs
with equal efficiency. Personal computers, including desktops, notebooks, smartphones, and
tablets, are all examples of general-purpose computers.
• Special Purpose Computer: It refers to a computer that is used for a specific purpose. It
does its single task very quickly and cannot be used for any other purpose. These types of
computers are generally used for controlling the process of manufacturing and for weather
forecasting systems.
Size, Speed, Processing Power and Cost
Computers differ in size, processing power, speed, and cost. On the basis of these factors,
computers can be categorised as follows:
Microcomputer
A microcomputer is a type of computer that has one microprocessor as its processing unit. It is
a small and less expensive digital computer. This type of computer is made to be used by a single
user at a time. A Microcomputer is also called a Personal Computer (PC). Some examples of
microcomputers are:
• Desktop: A desktop is primarily used in offices and at homes.
It is designed to fit comfortably on a desk. It is a personal
computer developed for regular use and generally placed in a
single location on a desk or table. All its components, such as
a keyboard, mouse, and storage devices, are connected using
wires or wirelessly. Due to its size and power requirements, we
cannot carry this type of computer. Desktop computers are Desktop
generally used in schools, colleges, offices, etc.
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