Application software development is the process of designing, creating, testing, and maintaining software for a specific purpose. It involves the development of custom programs and applications that are tailored to the needs of an individual or business. This type of software development is often used to create applications for the Internet, mobile phones, and desktop computers. Application software development can also involve creating business applications, such as customer relationship management (CRM) systems, enterprise resource planning (ERP) systems, and accounting systems. Additionally, application software development can include developing educational software, games, and other types of applications.