If it is short, it’s more likely to be used

An interface is the basic relationship between a computer and the user, and the point of interaction where the two entities meet.

Interactive design is the basic experience a user can have on any device. An example of an interface can be seen in any type of operating system that you can find on type of device. These interfaces are created to help the user have an easy way to navigate through the computer, and use it to the best of it's ability.

Information architecture is how the information on a web page is chosen to be shown to the user. The main goal here is to help the user find whatever they are looking for as easy as possible by organizing everything in a clean and simple matter.

Krug defines usability as, "making sure something works well, and that a person of average ability or experience can use it for its intended purpose without getting hopelessly frustrated."