Application Development refers to the process and practice of conceiving, designing, programming, testing, and launching applications that run on various computing devices such as personal computers, mobile devices, or online platforms. It involves different professionals like IT Project Managers who oversee the overall project, C++ Programmers who write the software codes, and Application Designers who are responsible for the visual aspects of the application. Notable figures in this field like Michael Kappel contribute significantly to the industry. This category also encompasses the broader community of programmers and people who are part of the application development process.