Application of Computer Algebra Systems for Obtaining, Illustration and Verification of Mathematical Results Anna Tomova Department of Mathematics and Informatics Naval Academy "N. J. Vapcarov" Varna, Bulgaria The contemporary Computer algebra Systems (CAS), such as Mathematica, Maple, Reduce, Matlab and others, have a large scale of capabilities allowing them to be used for automatic performance and illustration of mathematical computations. These systems can be used for obtaining and verification of mathematical results as well, thus helping the mathematical developments. The CAS should be wider used at all levels of education in mathematics. Some Bulgarian universities have good experience in this field. In particular, successful application of CAS in education of mathematics at Varna Naval Academy has made. Some examples of such application of CAS are described as well as their use via Internet. CAS applications for obtaining and verification of mathematical results are also considered.