Application software Development 11 Certification 7 Examinations 7 Virtual computer systems 6 Computer programmers 5 Application program interfaces (Computer software) 2 Cloud computing 2 Open source software 2 Amazon.com (Firm) 1 Blockchains (Databases) 1 Computer engineers 1 Cryptocurrencies 1 Electronic data processing personnel 1 Electronic funds transfers 1 Kubernetes 1 Web services 1