A communication system starts with sorting, processing and storing of information before its transmission. The actual transmission then follows, with further processing and filtering the noise. Then the reception includes processing steps such as decoding, storage and interpretation. Forms of communication include radio telephony and telegraphy, broadcasting, point-to-point and mobile communications, radar and computer communication.All the Concepts have been planned carefully and presented well with suitable illustrations. This book will be a source of inspiration not only for the taught but for the teachers too and will produce the desired outcome in the learners mind. The book will be very useful for the software engineers, designers, learners, and technical personals. Regardless of the immediate learning goals, the book is a handy reference and companion tool for future use.