STAAD.Pro, developed by Research Engineers International in 1997 (acquired by Bentley Systems in 2005), is a leading structural analysis and design software. It supports over 90 international design codes for steel, concrete, timber, and aluminum. The software performs various analyses, including static, p-delta, geometric non-linear, pushover, buckling, and dynamic methods like time history and response spectrum analysis. It integrates with tools like RAM Connection, AutoPIPE, and SACS for improved collaboration. STAAD.Pro is used for diverse structural projects, including buildings, bridges, towers, tunnels, metro stations, and water/wastewater treatment plants.