Most Alan Kay's presentations I've seen were worth watching. Tons of great ideas in each. They really improved how I reason about systems. There is this famous

Most Alan Kay's presentations I've seen were worth watching. Tons of great ideas in each. They really improved how I reason about systems. There is this famous talk from OOPSLA 1997: https://www.youtube.com/watch?v=oKg1hTOQXoY https://www.youtube.com/watch?v=oKg1hTOQXoY If you want to see what "practical" OOP looked like in the 80s, this is a good video: https://www.youtube.com/watch?v=QjJaFG63Hlo https://www.youtube.com/watch?v=QjJaFG63Hlo