The following are not trying to answer your question, but:
Object-Oriented Programming and Objectivist Epistemology: Parallels and Implications
"Most importantly, Booch's Object-Oriented Analysis and Design with Applications, which some people consider "seminal" in the field, explicitly refers to Rand as a contemporary "object-oriented" philosopher, and includes Introduction to Objectivist Epistemology in the bibliography.
I have no information as to how big of a role ITOE played in the development of Object Oriented, but having read the book, I would not at all be surprised if it played a rather large part. It essentially describes the mechanics of human concept-formation and how they reflect the real relationship between entities, attributes, and measurement. It lends itself very naturally to a computer-science approach.