Examinations Certification 6 Electronic data processing personnel -- 6 Microsoft software -- 5 Business English 2 Business English -- 2 English language -- 2 more ... Ability testing 1 Civil service -- 1 Client/server computing 1 Computer networks -- 1 Directory services (Computer network technology) 1 Language and languages -- 1 Officials and employees 1 Operating systems (Computer) -- 1 Oral communication -- 1 Public service commissions -- 1 less ...