alt Hacker NewsI studied the history of OOP a while back because I was curious, and I organized what I learned into my personal wiki[1]. From what I remember, there were quite a few different perspectives on it. One view traces OOP's practical ancestry back to Ole-Johan Dahl's Simula. From Alan Kay's perspective, on the other hand, an object was something like a small computer of its own.
The two main lineages of OOP are Simula and Smalltalk. But from what I recall, modern languages actually inherited more from the Simula side in practical terms, while the terminology and philosophy were influenced more by Smalltalk. [1]https://www.makonea.com/en-US/wiki/object-oriented-programmi...
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Depends on the language. I would argue that ruby inherited more from Smalltalk than from Simula, for instance.
You might like Casey Muratori's "The Big OOPs" talk about this, if you haven't seen it yet: https://www.youtube.com/watch?v=wo84LFzx5nI
It's my favorite deep dive into the subject, it's super thoughtful and well structured.
Cool; though a few facts on your landing page might need some reconsideration. See e.g. https://news.ycombinator.com/item?id=36879311.
> something like a small computer of its own
Which corresponds pretty well with the Simula I concept, published 1966 in the Communications of the ACM. A Simula event notice (time, process) in the sequencing set is just a message step(process, time) in a priority mailbox; the two are the same mathematical object, making Simula's discrete-event active processes and Kay's message-passing active objects trivially isomorphic.