The document discusses the use of computer programs like STAAD Pro for structural design and analysis. It explains how earlier structural designs were done manually using slide rules and calculators but computers now allow for more accurate analysis of frames, beams and modeling of entire buildings in 3D. STAAD Pro is highlighted as a powerful program that can be used for 3D modeling and analysis of multi-storied buildings, offering various analysis types and design capabilities for steel, concrete and other materials according to different codes.