Today's Era is commonly known as computer Era. The computations involving specific surface of particle mixtures, mean particle diameter, total number of particles, Screen effectiveness and effectiveness of screener in particle technology and terminal and settling velocities, specific gravity of the medium and displacement of solid particle in particle dynamics are estimated at a more speed with the help of the computer aided analysis in which a computer flow diagram will be prepared. A computer flow diagram is simply nothing but the flow sheet illustrating all the steps of the computation process and the detailed procedure followed in each step. In the present paper numerous problems are taken, coded in ‘C' language, tested with the manual and computer calculations and the results are compared and discussed provided with the application of numerical methods like Interpolation, extrapolation, Simpson's, Euler methods etc. The application of numerical methods is also incorporated for example calculating the area under curve. The main reason for the computer aided analysis in mechanical operations especially Particle Technology and Particle Dynamics is the repetition of the calculations.