1. Information Technology Department, Al-Zahra College for Women, Muscat 3365, Oman
2. Faculty of Computer Science and Engineering, Hodeidah University, Hodeidah P.O. Box 3114, Yemen
3. School of Computer Sciences, Universiti Sains Malaysia (USM), Gelugor 11800, Malaysia
4. Information Technology Department, AlBuraimi University College, Al Buraimi 512, Oman