A researching report should be prepared about one of these topics : 1-Database security system. 2-Optimal database design. 3-Database management system types and architectures. 4-Database management systems languages and interfaces. requirements: 1-collect 3 scientific published papers from any digital library, or more but no less. 2-the writer need to read the papers carefully prepare her/his own report to summarize,discuss ,and may suggest some new ideas on what she/he read. 3- Do not copy or rephrase written statements in the papers. 4-The collected scientific papers should be submitted with the report . 4- Report Format: Font Type: Times New Roman. Font Size: 12 pt. Line Space: 1.5 pt. ...