This course is for MicroStation CONNECT users from any discipline, modeling or designing 2D/3 D curves for functional purpose. It covers end to end workflow of creating curves like helices and spirals used in engineering. Both their accurate and approximate forms (using lines and arcs) are presented for some variations like Archimedes and Logarithmic spirals. Geometric concepts like continuity of tangents are explained and applied for smoother approximations. Finally, creation of any curve using its mathematical formulation is covered.