By Alexis Leon & Mathews Leon, Leon TechWorld, 1999.
“The emergence of the information age and the sudden
ubiquity of information technology are among the biggest—no,
they are the biggest—stories of our time.”
The Information Technology or IT is revolutionizing the way, in
which we live and work. It is changing all aspects of our life and
lifestyle. The digital revolution has given mankind the ability to
treat information with mathematical precision, to transmit it at
very high accuracy and to manipulate it at will. These
capabilities are brining into being a whole world within and
around the physical world. The amount of calculational power that
is available to mankind is increasing at an exponential rate.
Computers and communications are becoming integral parts of our
A few decades back communications used to be between people—one
person to another. But now inanimate objects are getting into the
act—books can tell the cash registers how much they cost,
identity cards can tell the door lock whether to open or not,
automated guided vehicles can tell the host computer where they
are in the shop floor and what they are carrying and when they
will be free, missiles can compare the landscape with their own
map and hit the target with pin-point precision, on the Internet
people engage in lively chats and discussions, play games even if
they are physically in different continents.
The changes mentioned above in computation and communication
adds up to what is called the information revolution or IT
revolution. To survive in this information world one must keep
pace with these changes.
This book is written to serve as an introduction to Information
Technology. The book deals with the fundamental concepts,
technologies and theories as well as advanced concepts and
practical applications. The book starts with an introduction to
computers and telecommunications and then later deals with the
latest developments and technologies.