This book, written in Greek, provides an introduction to MATLAB 5, covering many of its new features. Written for both the engineering student and the practicing engineer, it shows how MATLAB can be used to perform calculations, store tables and interpolate between stored values, process numbers obtained by data acquisition systems, and prepare engineering and research reports. The book starts off with a chapter that provides a concise MATLAB tutorial for users wishing to get quickly acquainted with MATLAB. Then the book is split into two parts. Part I is an introduction for the engineer, beginning with basic calculations and helping the user to master techniques for solving progressively more complex problems. Part II focuses on more advanced material, featuring specialized applications in dimensional analysis, system modeling and simulation, control system design, and signal processing, with some mechanical engineering case studies.