About OLE and Delphi
Automation in Delphi
In this article: how interfaces affect the creation of Automation servers and controllers in Delphi.
OLE AND COM
This chapter shows that OLE is simpler that you probably think. (Mastering Delphi 3, Chapter 21)
OLE Drag and Drop In Delphi
Object Linking and Embedding drag and drop with Delphi
OLE Structured Storage
"A Structured Storage file is also called a DocFile or an OLE compound file..."