Computer-aided architectural engineering (CAAE) is the use of information technology for architectural engineering, in tasks such as the analysis, simulation, design, manufacture, planning, diagnosis and repair of architectural structures. CAAE is a subclass of computer-aided engineering. The first Computer-aided architectural design was written by the 1960s. It helped architectures very much that they do not need to draw blueprints. Computer-aided design also known as CAD was the first type of program to help architectures but since it did not have all the features, Computer-aided architectural engineering created as a specific software with all the tools for design.