The requirements of the user are a primary focus in web architecture. Making sure a site meets the needs of a client and has a strong usability are keys to the approach. Since easy access to needed information is a priority for users, this approach can lead to intuitive design choices. Applications are programs that run on top of an OS.
Information System Architecture
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Information system (IS) architecture is a description of the sum total of the components that make up an organizational information system. This encompasses many different parts and can include both technological aspects such as technical framework, and product technologies as well as organizational aspects, such as policy or business processes.
There are a number of ways to break IS architecture down, but it is generally made up of four layers and each can be broken down into smaller subunits. The four primary layers of information systems architecture are the business process architecture, the systems architecture, the technical architecture, and the product delivery architecture.