Examinations Certification 918 Electronic data processing personnel 779 Computer networks 456 Computer security 211 Security measures 206 Cloud computing 168 Engineering & Applied Sciences 167 Computer technicians 135 Computer Science 120 Computing Technology Industry Association 118 Microsoft software 106 Telecommunications engineers 105 Microcomputers 94 Management 93 Maintenance and repair 89 Operating systems (Computers) 85 Linux 62 Electrical & Computer Engineering 60 Telecommunications 56 Microsoft Windows server 55 Information technology 53 Microsoft Azure (Computing platform) 49 Amazon Web Services (Firm) 48 Microsoft Windows (Computer file) 48 Internetworking (Telecommunication) 45 Development 44 Application software 38 Database management 38 Project management 38