This book is meant for the students of Engineering courses, specially of Gulf Cooperation Council (GCC) countries. Necessary theory is employed in outlining definitions, formulae, laws, etc.; however, intention is to introduce the topics through examples, applications and analogies, instead of abstract theoretical arguments. The book explains:

• basics of differential equations, formation of differential equations, order and degree;
• solutions of differential equations by variable separable, homogenous, non- homogenous, linear, nonlinear exact, and reducible to exact differential equations;
• orthogonal trajectories;
• nth order differential equations, simultaneous differential equations;
• boundary value problems;
• Laplace transform;
• Z-transform; and
• Fourier transform.