Development 9 Application software 8 JavaScript (Computer program language) 4 iOS (Electronic resource) 3 Android (Electronic resource) 2 Mobile apps 2 Python (Computer program language) 2 Ajax (Web site development technology) 1 Application program interfaces (Computer software) 1 Augmented reality 1 Blockchains (Databases) 1 Cascading style sheets 1 Computer networks 1 Computer programming 1 Computer security 1 Computer software 1 Cryptocurrencies 1 HTML (Document markup language) 1 Hacking 1 Information technology 1 Java (Computer program language) 1 Linux 1 Machine learning 1 Node.js 1 Operating systems (Computers) 1 Percival, Rob 1 PostgreSQL 1 Security measures 1 Swift (Computer program language) 1 Vocational guidance 1