The book contains the most important formulas and numerous fully solved problems related to the textbook "Technical Mechanics 4." The authors place particular emphasis on finding the solution path and formulating the fundamental equations. The great success of the second edition necessitated a new edition, which the authors used for editorial revision and supplementation. The content covers hydromechanics, fundamentals of elasticity theory, statics of special structures, vibrations of continuous systems, an introduction to stability theory, viscoelasticity and plasticity, as well as numerical methods in mechanics. The book is aimed at engineering students from all disciplines at universities and colleges.