This book was written based on the wide experience along many years in which the author achieved, tested and implemented in assembly language many programs. Most of the programs presented in this book represent a part of scientific research activity. The book has seven chapters and three appendixes. The first six chapters present the language and techniques basics in order to develop application programs. The next chapter is dedicated for complex applications based on software engineering approach and in appendixes are listed the full assembly language code for the applications. The book is mainly for students in Computers and Control Engineering, but can also be used by other students that are studying programming languages. The book is useful for Master degree and Doctoral degree students that want to improve themselves in assembly languages programming techniques. I believe that the programmers that want to produce compact real-time high-speed portable software will appreciate this work. For all, the book offers methods, techniques and useful solutions embedded in reliable code that can be easily implemented.