A Computer is a Programmable electronic device that can process,
store and retrieve data. It processes data according to a set of instructions
or program. It is a machine used as control systems for a huge variety
of industrial and consumer devices. Wonderful Device can be instructed to
carry out sequences of arithmetic or logical operations automatically via
computer programming.
All Computers Consist
of two basis parts software and Hardware. The Hardware is the physical part of
the machine include central processing unit (CPU), monitor, mouse, keyboard,
computer data storage, graphics card, sound card, speakers and motherboard. Software is a set of
instructions that tells the computer what to do.
There are varieties of type of Computer such as micro, mini,
mainframe, super, workstations, information appliances, embedded, public,
personal, shared and display.
Computers are the great
technological and scientific innovations. The computer has changed how we work,
how we organize, and store information, how we communicate with each other and
even the way that we can think about universe and human mind. Hundreds of
millions of computers around the world serve us
in many ways, from
helping us to write books to microwaving our food.
There are two distinct
families of computing devices, namely, digital computers and the historical
analog computer. The earliest computers ware analog not digital. These both
computers operate on quite different principle.
A digital computer is a
sequential device that generally operates on data one step at a time. The data
are represented in binary format, and a single transistor is used to represents
a binary digit in a digital computer. An
analog computer operates in completely
different way to a digital Computer. The representation of data in an analog
computer reflects the properties of the data that are being modelled.
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