We use web applications every day. Online banking, appointment scheduling, customer portals and inventory systems can look very different, but many rely on the same basic components working together behind the scenes.
Understanding those components can also help a business make better decisions when planning a new website or application.
The user interface
The part you see in your browser is commonly called the front end. It includes the pages, forms, menus, buttons and other elements you interact with.
A good interface isn’t simply attractive. It should make it easy for someone to understand what to do and complete a task without unnecessary steps.
The application
Behind the interface is the logic that determines what happens when a user performs an action.
Suppose a customer schedules an appointment. The application might need to verify that the requested time is available, associate the appointment with the correct customer and send the information to another system.
The database
Most applications need somewhere to store information.
A database might contain customer accounts, products, appointments, transactions or thousands of other records. The application communicates with the database to retrieve information and securely make changes when necessary.
APIs and other services
Modern applications rarely operate entirely by themselves. They may communicate with payment processors, mapping services, email providers or other business systems.
An Application Programming Interface, or API, provides a structured way for these systems to communicate.
The infrastructure
All of this has to run somewhere. Servers, networks, operating systems and cloud infrastructure provide the environment that allows an application to operate.
That is why web development involves more than what appears on the screen. A well-designed application considers the user interface, software, database, security and infrastructure as parts of the same system.
When those components are designed to work together, the technology becomes largely invisible to the user. They click a button, something happens and it works. That’s usually a pretty good sign that someone did their job correctly.
