Web development is a broad term for the work involved in developing a web site for the Internet. Web development can range from developing the simplest static single page of plain text to the most complex web-based internet applications, electronic businesses, and social network services. A more comprehensive list of tasks to which web development commonly refers, may include web engineering, web design, web content development, client liaison, client-side/server-side scripting, web server and network security configuration, and e-commerce development. Among web professionals, “web development” usually refers to the main non-design aspects of building web sites: writing markup and coding. Most recently Web development has come to mean the creation of content management systems.

Software development is the process of computer programming, documenting, testing, and bug fixing involved in creating and maintaining applications and frameworks resulting in a software product. Software development is a process of writing and maintaining the source code, but in a broader sense, it includes all that is involved between the conception of the desired software through to the final manifestation of the software, sometimes in a planned and structured process. Therefore, software development may include research, new development, prototyping, modification, reuse, re-engineering, maintenance, or any other activities that result in software products.

Application migration is the process of moving an application program from one environment to another. Examples include migration from an on-premises enterprise server to a cloud provider’s environment or from one cloud environment to another. Migrating an application can be complicated because there are bound to be differences between the original and target environments. Furthermore, applications even cloud applications are not typically designed to be portable. Applications created on various cloud development platforms, such as Windows Azure, Google App Engine and Force.com, are usually designed to run on the platforms they were developed on. Other elements such as operating systems, management tools, the networking architecture, the storage system and the virtual machine (VM) configuration can all differ from those in the environment where the application was developed or deployed.

A mobile app is a computer program designed to run on a mobile device. Mobile applications often stand in contrast to desktop applications that run on desktop computers, and with web applications which run in mobile web browsers rather than directly on the mobile device. The term “app” is a shortening of the term “software application”. It has become very popular, and in 2010 was listed as “Word of the Year”. Developing apps for mobile devices requires considering the constraints and features of these devices. Mobile devices run on battery and have less powerful processors than personal computers and also have more features such as location detection and cameras.