5.5 Object Oriented Programming Guide - Turbo Pascal

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.

The Official OOP Guide (now a cult classic among retro-coders) famously told users to "strive to forget what people have told you about OOP" and just sit down and try it. 2. The Language Evolution Turbo Pascal 5.5 Object Oriented Programming Guide

Flexibility in how memory was handled.

Automating the creation and cleanup of object data. 3. The "Blue Box" Era Before version 5

Allowing for polymorphism where child objects could redefine behavior. The Official OOP Guide (now a cult classic

Influencing the "native code" approach rather than an interpreted one. Key Innovations in 5.5 included:

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