Muhammad Zaini Matondang is master student in Computer Science and Information System at the Universiti Teknologi Malaysia, Johor, Malaysia. He holds Bachelor degree in Pure Mathematics from the University of Sumatera Utara, Medan, Indonesia in 2005, and finishing his study in master degree by June 2008. Since 2004, Zaini has doing research in few fields, such as graph theory, combinatorial, matrices theory, and now focus on solid modeling. He leads and teaches modules at BSc levels in mathematics and computer science, especially in MATLAB programming and also active in research group sponsored by MOSTI Malaysia.