The domain of this research are CASE tools, designated for requirements engineering, which are able to generate computerized information system prototypes. The main goal of this project is to design software, which would enable to generate an IS prototype from requirements specification, created re specification method, suggested by the Information Systems department. The software is a part of a CASE tool, designed by the IS department. The CASE tool is designated for creating requirements specification and the software will provide additional functionality to it. The opportunities of computerized IS prototyping using Oracle Designer, Visual FoxPro and MS Access were analyzed. In case of Oracle Designer, in order to create a computerized IS prototype we have to go through the whole design stage. In case of DBMS Visual FoxPro and MS Access we must have a database designed. And the software for generating computerized IS prototype enables you to generate a system prototype at an early design stage and without having the system project.