Delphi / Object Pascal

Delphi (RAD Studio) and Free Pascal (Lazarus) keep Object Pascal alive. It is famous for Single EXE deployment and instant compilation.

When to Use

• Windows Desktop Apps: The VCL framework is still the fastest way to build native Windows GUIs.
• Legacy Maintenance: Massive industrial controllers in Europe use Delphi.
• Cross-Platform: FireMonkey (FMX) and Lazarus allow targeting Mac/Linux.

Core Concepts

VCL / LCL

Visual Component Library. Drag-and-drop UI building.

Units

interface, implementation sections. Strict modularity.