Electronic data processing personnel Certification 810 Examinations 753 Computer networks 321 Computer security 155 Security measures 128 Engineering & Applied Sciences 122 Cloud computing 111 Computer Science 105 Computer technicians 103 Microsoft software 82 Computing Technology Industry Association 68 Management 67 Microcomputers 67 Maintenance and repair 64 Operating systems (Computers) 57 Linux 51 Microsoft Windows server 45 Information technology 43 Microsoft Windows (Computer file) 37 Telecommunications engineers 36 Amazon Web Services (Firm) 35 Web services 28 Database management 27 Client/server computing 26 Electrical & Computer Engineering 26 Internetworking (Telecommunication) 26 Telecommunications 25 Routing (Computer network management) 23 Virtual computer systems 23