i learn and study this subject: - system analysis. - system design. - A++. - n+. - c++. - c#. - Algorithm. - OPP. - Network. - Database. - DSS. - Operation Research. - Matlab. - html. - mathematics. - Data Structure. - Microprocessor &Assembly language. - Operating System. - Software Engineering. - Data Communication. - Project Management. - Management Information System. - Library information Systems. - GIS.