The process of creating computer programmes, or a collection of programmes, to carry out the many activities required by businesses is known as application development. It can also be described as the process of building software applications. There are several different types of application development: Web Application Development: It involves building web applications with HTML, CSS, JavaScript and other web technologies. Mobile Application Development: It involves building mobile apps for iOS, Android and Windows Phone with Xamarin or React Native. Desktop Application Development: It involves building desktop apps with Visual Studio, Eclipse or Qt Creator using C#, C++ or Java.