This book describes building blocks of computer, register transfer language and architecture of a simple processor in easy to understand language with ample number of illustrations.Br>cpu organization, assembly language programms and various Arithmetic algorithms are all explained in such a manner, that students can understand these technical topics very easily. Input/output organization, memory organization are some of the hardware features of a computer which are evolving everyday.Concepts behind these systems are covered with maximum number of diagrams and easy to understand examples.   a special characteristic of this book is that large number of objective questions and solved Sample Papers are included at the end of each br>chapterreaders can evaluate their progress easily by solving these papers and comparing answers.