The performance of Microcomputer has been increasing exponentially since its inception in early 1970s. Microprocessors are the workhorses of modern high performance system. The significance of microprocessor and its requests is well known in science & Tech, IC design and Engineering fields. This book contains the information of Microcomputer, 8085, 8086 architectures, short question and its programming. The book is structured to cover all key aspects of different types of microprocessor programming. The topic of Block diagram, Architectures is discussed in detail. It is use full and help to the students, scientists, researcher and Engineers for the purpose of learning assembly language programming.