Software prototyping is the activity of creating prototypes of software applications, i.e., incomplete versions of the software program being developed.

Design is the creation of a plan or convention for the construction of an object, system or measurable human interaction.

Web development is a broad term for the work involved in developing a web site for the Internet (World Wide Web) or an intranet (a private network).

Usability testing is a technique used in user-centered interaction design to evaluate a product by testing it on users.