IT system

As explained in Simple Object-Oriented Design: Create clean, maintainable applications

An information system is a software system that organizes and processes information for a business or other domain.

An IT system organizes and processes information for a business or other domain. A typical information system combines a frontend, a backend, and a database: the frontend presents information, the backend handles requests and business logic, and the database stores persistent information. section 1.4

A backend commonly divides responsibilities across:

• A Controller receives requests, converts them into commands, and coordinates work. section 1.4
• A domain Model represents business rules through collaborating classes. section 1.4
• Database access retrieves, inserts, updates, or deletes the information used by backend actions. section 1.4
• External services and APIs extend the system’s capabilities and allow other applications to use it. section 1.4 section 1.5

PeopleGrow!

PeopleGrow! manages employees, training courses, learning paths, course offerings, enrollment, trainers, and reports. Its frontend supports administrators, while APIs let other applications enroll employees. The backend also connects to company chat and calendar systems for messages, notifications, and invitations. section 1.5

Figure 1.8 A traditional information system with a frontend, a backend, and a database

Use the architecture diagram to trace how a frontend, backend, and database cooperate within an information system. section 1.4

Figure 1.10 The high-level architecture of PeopleGrow!

Use the PeopleGrow! architecture diagram to inspect the relationships among its frontend, backend, database, APIs, and external company systems. section 1.5

How Simple Object-Oriented Design: Create clean, maintainable applications covers it

How deep it goes

Explains major layers, backend roles, request flow, persistence, and integrations, but defers detailed architectural patterns and frontend design.

Examples

Uses online-store, financial, e-learning, and PeopleGrow! systems, including training management and company-service integrations.

What you can do after

Evaluate/understand how an enterprise backend receives requests, applies business rules, persists information, and integrates with other systems.

How it connects

Connects frontend, backend, database, MVC, Controller, domain Model, APIs, and external services.

liveBookmanning.com

Read Simple Object-Oriented Design: Create clean, maintainable applications on liveBook Get the book at manning.com

Also explained in

• 

  liveBookmanning.com
  Digital Twins in ActionAn information technology system is a computing system that manages enterprise information, applications, and business processes rather than directly controlling physical processes.

Compare how 2 books explain IT system →

Related concepts

• operational technologycontrasts with · Operational technology comprises hardware and software systems that monitor or control physical processes, equipment, and industrial operations.
• frontend developmenthas part · Frontend development is the practice of building the user-facing, client-side interfaces and behavior through which people interact with software.
• databasehas part · A database is an organized collection of persistent data managed by software for storage, retrieval, querying, and modification.
• backendhas part · A backend is a software component or subsystem that provides underlying processing, data access, execution, or services to clients or other components, typically behind a user-facing interface.

This explainer was generated by Manning's knowledge graph from the text of Simple Object-Oriented Design: Create clean, maintainable applications. The section links point to the parts of the book it draws on.