Turbo Pascal 5.5 Object Oriented Programming Guide (2025)

Automating the creation and cleanup of object data. 3. The "Blue Box" Era

Larry Tesler’s work for the Macintosh. Turbo Pascal 5.5 Object Oriented Programming Guide

Before version 5.5, Turbo Pascal was the undisputed king of MS-DOS because of its speed—it could compile programs in seconds that took other compilers an hour. When version 5.5 arrived, it brought to the masses. For many developers, this was their first real exposure to concepts like classes, inheritance, and polymorphism. Automating the creation and cleanup of object data

The story of the is the story of a "Cambrian explosion" in the world of PC development. Released on May 2, 1989 , it didn't just add features; it fundamentally shifted how an entire generation of MS-DOS programmers thought about code. 1. The Shock to the System Before version 5

Borland didn't invent these concepts from scratch. The OOP extensions were heavily inspired by: