What is Delphi and why study it in 2025

Delphi is a programming language based on Object Pascal that has remained a tool for fast and reliable software development for nearly three decades. Despite competition from modern languages, it continues to be used in business applications, engineering systems, and corporate solutions where stability and high performance are important.

What is this language
Delphi is an object-oriented programming language and integrated development environment created in 1995 by Borland. The language is based on Object Pascal, and its key principle is Rapid Application Development, meaning rapid visual application development. Today, it belongs to Embarcadero Technologies, which continues to develop the platform as part of RAD Studio. Modern versions allow creating applications for Windows, macOS, iOS, Android, and Linux.

Delphi is known for its simple syntax, convenient visual design tools, and powerful database support. It is actively used where stable architecture, offline operation, and high execution speed of software code are required.

Uniqueness
— visual design, the application interface is created in graphical mode by dragging elements, which accelerates the development process
— compilation to machine code, programs written in Delphi run quickly and do not require interpreters or virtual machines
— database integration, supports FireDAC, MySQL, Oracle, InterBase, and other systems
— cross-platform capability, the same code can be compiled for different operating systems
— longevity, applications created 10–20 years ago continue to work stably, making Delphi in demand in projects with long lifecycles

Courses

Software Development in Borland Delphi
A free Russian-language course designed for students and beginner developers. It systematically covers the basics of the Delphi environment, program structure, interface work, event handling, and database connection. The course combines theoretical materials and practical tasks that can be performed directly in the browser.

Learn To Program with Delphi and Object Pascal
A classic English-language course for beginners who want to learn programming from scratch using Delphi and Object Pascal. The author systematically explains the basics of syntax, principles of working with variables, loops, and functions, and then moves on to object-oriented programming. The course includes exercises and practical projects.

Delphi for Beginners: Learn to Create Your Own App
This course focuses on the practical creation of applications from scratch. Students will learn how to organize a project, add interface elements, handle user input, and compile a finished application. Explanations are accompanied by demonstrations of the IDE in action, making the learning process as clear as possible.

Useful Resources

Embarcadero DocWiki — official documentation for RAD Studio and Delphi.
Delphi Basics — reference guide for syntax and code examples.
LearnDelphi.tv — educational project with video lessons and practical recommendations.
Lazarus IDE — a free alternative to Delphi, compatible with Object Pascal.