This course is designed to provide an orderly treatment of the essentials of both macroscopic problems and detailed microscopic structure of fluid flows. Topics include continuum hypothesis, kinematics, body forces and surface forces, conservation laws, constitutive equations, one-dimensional flows, dimensional analysis, low Reynolds number flows, potential flows, boundary layer theory, turbulent flows and macroscopic balances. Prerequisites by topics are as follows: ordinary differential equations and partial differentiations, multiple integrals, Taylor series, basic elements of vector analysis, material and energy balances and elementary mechanics.