Delphi is a vast programming language – too vast to do it justice with just one quick reference card. Here we have provided a summary of the core features. A separate quick reference describing Delphi objects,classes and interfaces will be provided in due course. We have deliberately left out features which we feel were added as a sop to VB programmers and detract from what good Object Pascal should be.
https://www.explainth.at/wp-content/uploads/2018/03/dquick.pdf