This was the book that defined components https://smile.amazon.com/Component-Software-Beyond-Object-Or... At the time components were going to be the next level above objects - they were the black box that contained a lot of objects and provided a nice programmer interface. Unfortunately the ideas seem to have disappeared, Delphi is an even better example of a component model than VB was imho.

Which is ironic, given that people tend to forget that it was C++ which made OOP mainstream, there wasn't any Java or C# back then, two fully OOP based languages.

The other part is that component oriented programming is actually a branch of OOP, from CS point of view, with books published on the subject at the beginning of the century.

"Component Software: Beyond Object-Oriented Programming"

https://www.amazon.com/Component-Software-Beyond-Object-Orie...

First edition uses Component Pascal, Java and C++, with the 2nd edition replacing Component Pascal for C#.