Hi Jing,
DIAdem is shipped in two revisions. Both revisions are designed to manage data, analyze them, create reports and automate this all using VBScript. Additional one DIAdem revision contains the DAC part. That means that every DIAdem version (8.0/8.1/9.0/9.1) can have the DAC part, it depends and the revision which was bought.
Greetings
Walter Rick